The Workhorse's
~The History of the Gibson J-45~

The J-45, Passed Down Through Generations

Part 1: Gibson J-45 History: Introduction to 1942–

Part 2: 1964–1969 Timeline (This Page)

Gibson 1965 J-45 Adj.


. The cherry color on the rim of the body top has faded, giving it an overall orange hue.
Further fading makes it look like a natural finish, making it nearly indistinguishable from a J-50.
Since there are no structural differences between the J-45 and J-50, you must identify them by the stamp inside the body. If the stamp is worn off, visual inspection is necessary.
After seeing many, you'll learn to tell the difference between faded cherry and the J-50's natural finish. This fading is seen on models from 1963 to 1966. The adjustable bridge features a wood saddle. The wood used is primarily rosewood and ebony.

Additionally, you'll notice a black paint application called the "stinger" at the neck-to-body joint.
This stinger was originally an ornamental feature applied to the back of the headstock on higher-end models like the J-200, Super 400, and L-5. However, it was occasionally applied in this manner to conceal machining marks or damage during production.
Nowadays, it's sometimes intentionally added as a custom feature, appealing to enthusiasts.

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Gibson 1965 J-45 Adj.

Serial number engraved on the headstock indicates this is a 1965 model.
This year saw a major specification change for vintage Gibsons. The neck, which had a nut width of around 42mm to 43mm, was reduced to approximately 40mm—the birth of the so-called "narrow neck." This was an innovative event, as the same specification change was implemented not only on acoustic guitars but also on electric guitars.
This change significantly impacted playability and sound.

Which is "better"—narrow neck or regular neck?

This question has likely been asked countless times before. By now, the view that "narrow necks are unpopular" may be in the minority.
Of course, in the vintage market, pre-1965 regular-neck models hold higher antique value and command higher prices.
However, the narrow neck has its own unique appeal. Take playability, for instance. For players who frequently use the "western grip"—where the thumb presses the root note—the narrow neck offers a more comfortable grip and greater freedom during performance.Singer-songwriter Motohiro Hata uses a 1966 J-45, and his playing style clearly reflects this narrow-neck aesthetic.
Furthermore, the narrow neck imparts a distinct sonic character. Its sharp, crisp, and clean tone is particularly appealing. A prime example is the 1967 J-45 used by Takuro Yoshida.On the track "Ringo" from the classic album Genki desu., Takuhiko Ishikawa plays on Yoshida's J-45, showcasing that very crisp sound. Percussive bass notes and a slightly compressed, tight tone.
This is precisely the charm only a late 1960s J-45 can deliver.

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Gibson 1966 J-45 Adj.

Based on the serial number stamped on the back of the headstock, this is a 1966 model.
The cherry sunburst has faded beautifully, giving it that quintessential '66 look. Besides the narrow neck, the 14° headstock angle is also characteristic of this period.
This feature also began transitioning from 1965.
Another noteworthy point is the tuning machines used.
They were manufactured by Gotoh, a leading Japanese parts maker. While commonly seen on 1967 J-45s and small-body models, it's extremely rare to find them on 1966 instruments.
This particular guitar has been fitted with larger, thicker knobs from the same era, replacing the standard ones.
However, the original also featured Gotoh-made tuning machines.

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Gibson 1966 J-45 Adj.
Cherry Red "BGN" Stamped

Based on the serial number stamped on the headstock, this is a 1966 model.
It features a cherry red color on the body top, not a sunburst. The first question that immediately comes to mind is why it has a 1966 serial date and a cherry color. Generally, acoustic custom colors (primarily cherry red and ebony black) correspond to serial dates from 1967 to 1969.The key to resolving this question is the "BGN" stamp found on the back of the headstock.

This stamp was not added later by an owner; it is believed to have been applied at the Gibson factory. "BGN" is one of the identification marks stamped on the back of the headstock at the Gibson factory, standing for "Bargain." This indicates a guitar sold to employees at a significantly discounted price, meaning it was not intended for the general market.Therefore, we believe this particular instrument had issues for general distribution and was sold to employees as a cherry red model.

Regarding Gibson Acoustic Custom Colors, we cannot confirm official records explaining why they were created or the circumstances surrounding their production.
Details remain unclear. For electric guitars, Custom Colors were adopted starting with the 1963 Firebird, featuring a color chart allowing users to select their finish.

The characteristics of acoustic custom colors are as follows:
- Commonly seen from 1967 to 1969
- Many have a second stamp
- Some have a 4-piece body top
- Also seen on small-body models like the B-25 and LG-1, and on models like the Epiphone FT
-Rare colors like brown also exist

Given this situation, the most plausible explanation currently is that guitars that couldn't be shipped as standard products under normal criteria were made saleable by altering their finish impression through custom coloring. In other words, it's thought that custom colors were utilized to reduce factory yield loss.

Gibson 1967 J-45 Adjustable-

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Based on the serial number stamped on the back of the headstock, this is a 1967 model.
The appearance of the Cherry Sunburst color changed starting this year.The red on the rim is a brighter crushed color, showing less fading over time compared to instruments made up to 1966.
One can imagine that by this time, fading of the Cherry Sunburst finish was already a concern, leading to a change in the paint to prevent color loss.
The pegs are Gotoh. The bushings are chrome (only the 4th string has been replaced with nickel).

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Gibson 1967 J-45 Adj.

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Based on the serial number engraved on the back of the headstock, this is a 1967 model.
The sunburst coloring is very striking. Brown-based sunburst colors made a comeback starting this year.
Compared to early 1960s models, it differs in that the rim shows a reddish hue when faded.
It closely resembles the J-45 used by Takuro Yoshida.
He himself appears to have used it with various saddles, including ceramic, fixed, and wood saddles.

Gibson 1968 J-45 Adj.

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Although the serial date is 1970, this particular instrument was determined to be a 1968 model based on specifications such as the Gibson logo design on the pickguard and the coloring. It offers a completely different impression from the tobacco sunburst mentioned earlier, with the black color on the rim side remaining distinctly intact.Looking at the back of the headstock, a second stamp was present, leading me to believe the finish was reworked at the factory. The paint texture is slightly thicker, and there are visible signs suggesting the neck was also refinished.
That said, its condition is undeniably excellent. It's a textbook vintage example, allowing one to imagine what a tobacco sunburst J-45 from that era would have looked like.
Regarding the Gibson logo on the pickguard, like the custom colors, the background details remain unknown.
This design appears on the back cover of the 1966 catalog. Some suggest it represents fingers pressing strings on the fretboard, but personally, I find the interpretation of it symbolizing the Sound Barrier very plausible.
When this graphic is featured in official Gibson merchandise, it's also referred to as "Soundwave."

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Gibson 1968 J-45 Adj.
Ebony Black

Based on the Gibson logo design on the pickguard, the coloring, and the bridge specifications, this individual was determined to be a 1968 model.
It's an "Ebony Black" model, notable for its jet-black coloring and yellowish plastic accents.
Upon closer inspection, you can see this particular body is a 4-piece construction.
While this would be noticeable on a sunburst or natural finish, it certainly isn't noticeable on a jet-black finish.

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Gibson 1968 J-45 Adjustable
Cherry Red

Based on specifications like the serial number and bridge, this is determined to be a 1968 model.
This model also has a 4-piece body top. The Cherry Red has faded over time, resulting in a lighter, "cherry blossom"-like color.
Instruments with this type of fading are not uncommon. It's a vintage-specific finish.
The pickguard is a screw-on white type without the Gibson logo. Originally, the screws were also painted white, but here the paint has peeled off, exposing the metal.

Gibson 1968 J-45 Adj.
Ebony Black

Serial number engraved on the headstock indicates a 1968 model.
It boasts a majestic ebony color. The pickguard is a screw-on white model without the Gibson logo. The texture, yellowed with age, is simply irresistible.
The binding shows similar aging, making this yellow and black combination truly magnificent.
This is the quintessential vintage ebony black appearance.
The bridge is down-bowed. This specification began appearing from the 1968 serial date.
And this 1968 J-45 Ebony Black with the down-bowed bridge shares the same specifications as the "No. 1" model Kazuyoshi Saito uses as his main guitar. He personally removes the saddle screws and uses it with the saddle flush against the body.

Gibson 1969 J-45 Adjustable-

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Based on the serial number engraved on the headstock, this is a 1969 model.
Structural features include the down-bowed bridge introduced in 1968, a 43mm nut width, an enlarged bridge plate, and an L-shaped neck block—specifications characteristic of the transitional period leading into the 1970s.
The bridge plate uses rosewood. Maple is sometimes used even for this size, so the wood used may vary by individual instrument.
It's quite large, though. Such structural changes are also seen in Martin guitars from the same period.
Martin changed the bridge plate material from maple to rosewood in 1968, and increased its size in 1969.
These trends suggest a manufacturer-independent push for structurally reinforced designs across acoustic guitars, a trend strongly reflected in the J-45's design.

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Gibson J-45 Inventory List

Timeline
(1942–1969)

※This is statistical data and is provided for reference purposes only.
If you have seen or own any irregular or special specifications, please provide information to the email address below.
Email Address: aco@tcgakki.com
Advance Guitars Attn: Inoue


from the 1940s

1942–1945

It is extremely difficult to lump together the so-called "banner period" from 1942, when the J-45 was born, to 1945.
Summarizing the specifications confirmed so far yields the following.
Other than this, there are unique specifications abundant due to the wartime period, such as no truss rod being installed,
the body top being 4-piece, or the wood used for the neck block being poplar instead of mahogany.

Instruments with maple sides and back feature a dark tone finish.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce or Mahogany
【Body Sides & Back】: Mahogany or Maple ※Laminated models exist
【Neck】: Mahogany or Maple (3-piece/5-piece)
【Fingerboard】:Brazilian Rosewood or Gumwood
【Bridge】:Brazilian Rosewood or Gumwood (Rectangular)
【Bridge Plate】:Maple (Small Size)
【Bracing】:Scalloped X-Bracing

【Saddle】:Straight Saddle
【Pegs】:
【Pickguard】: Celluloid Teardrop (Small Size) Tortoiseshell Pattern or Fire Stripe

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm to 45mm
【HEAD ANGLE】: 17°
【Head Taper】: Yes
【Number of Frets】: 19

【Logo】Script & Banner
【Soundhole Ring】Single Ring, 7-ply
【Body Binding】Multi or Single

【Soundhole Ring】Single Ring 7-ply xml-ph-0024@deepl.internal 

1946–1947

By 1946, the wood species used were established.
This is the familiar J-45 specification.
The soundhole ring and body binding cells became simpler with fewer plies.
Additionally, the banner headstock was discontinued, leaving only the script logo design.
In 1947, the block-style modern logo began appearing.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Rectangular)
【Bridge Plate】: Maple (Small Size)
【Bracing】: Scalloped X-Bracing

【Saddle】: Straight Long Saddle
【Pegs】:Crewson Triple Open-Back
【Pickguard】: Celluloid Teardrop (Small Size) Tortoiseshell Pattern

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm–45mm
【HEAD ANGLE】: 17°
【Head Taper】: Yes
【Number of Frets】: 19

【Logo】Script or Modern
【Soundhole Ring】Single Ring 3-ply
【Body Binding】Single

 

1948

The bridge shape began changing starting in 1948.
Primarily rectangular until then, the upper belly design became mainstream from 1949.
Individuals featuring the down belly design used on the Southern Jumbo during the Banner era have also been confirmed.
The 43mm nut width became mainstream, and the so-called extra-thick necks likely disappeared around the previous year, 1947-1948.

~Main Specifications~
【Finish】Sunburst

【Body Top】Spruce
【Body Sides & Back】Mahogany
【Neck】Mahogany
【Fingerboard】Brazilian Rosewood
【Bridge】Brazilian Rosewood (Rectangular or Upper Berry or Down Berry)
【Bridge Plate】Maple (Small Size)
【Bracing】:Scalloped X-Bracing

【Saddle】:Straight Long Saddle
【Pegs】:Kluson Triple Open-Back
【Pickguard】:Celluloid Teardrop (Small Size) Tortoiseshell Pattern

【Scale】:Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】:17°
【Head Taper】:Yes
【Number of Frets】: 19

【Logo】: Modern
【Soundhole Ring】: Single Ring, 3-ply
【Body Binding】: Single

 

1949

In 1949, Kluson Deluxe tuners with gear covers began to be used.
During this period, the covers featured a single row of "KLUSON DELUXE" engraving .
The gear cover design lacked holes for the peg knob shafts on the inside.
It is also believed that the body trim binding configuration—top: 3-ply, back: single— was established around this time.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Bracing or very rarely Rectangular)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Scalloped X-Bracing

【Saddle】:Straight Long Saddle
【Pegs】:Kluson Triple Open-Back or Kluson Deluxe Tuner "Single Line" (No Post Hole)
【Pickguard】: Celluloid Teardrop (Small Size) Tortoiseshell Pattern

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: Yes
【Number of Frets】: 19

【Logo】: Modern
【Soundhole Ring】: Single Ring, 3-ply
【Body Binding】 : Top: 3-ply, Back: Single

 

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1950s

1950–1954

The early 1950s saw mixed specifications , including bridge saddles, headstock tapers, and tuning pegs.
While Factory Order Numbers (FON) can identify the model year,
many have faded away. Therefore, selecting based on preferred specifications, sound, and playability is recommended.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Scalloped X-Bracing

【Saddle】: Straight Long Saddle (Confirmed on 1954 model) or Straight Short Saddle(also confirmed on 1952 models)
【Pegs】: Kluson Deluxe Tuners "Single Line" (no post holes) (primarily until 1952) or "No Line" (no post holes) (primarily 1952-1953) or "No Line" (with post holes) (primarily 1953 onwards)
【Pickguard】: Celluloid teardrop (small size) tortoiseshell pattern

【Scale】: Medium scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: Present (also confirmed on 1953 model) or Absent(also confirmed on 1951 models)
【Number of Frets】: 19

【Logo】: Modern
【Soundhole Ring】: Single Ring, 3-ply
【Body Binding】: Top: 3-ply, Back: Single

Body Binding: Top: 3-ply Back: Single 

1955

Major specification changes in 1955 are as follows.
- Scalloped X-bracing → Non-scalloped X-bracing
- Small pickguard → Large pickguard
- 19 frets → 20 frets
As this was a transitional period, various specification combinations are likely to exist.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple(Small Size)
【Bracing】: Scalloped X-Bracing or Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle
【Pegs】: Krueson Deluxe Tuners "No Line" (with post holes)
【Pickguard】: Celluloid Teardrop (Small Size) Tortoiseshell Pattern or Large Size

【Scale】:Medium Scale
【Nut Width】:Approx. 43mm
【HEAD ANGLE】:17°
【Head Taper】: None
【Number of Frets】: 19 or 20

【Logo】: Modern
【Soundhole Ring】: Single Ring, 3-ply
【Body Binding】: Top: 3-ply, Back: Single

 

1956

In 1956, the adjustable saddle was introduced .
Additionally, while minor, structural changes includea slightly larger bridge plate
and lower bracing height.

~Main Specifications~
【Finish】Sunburst

【Body Top】Spruce
【Body Sides & Back】Mahogany
【Neck】Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple (Small Size)
【Bracing】: Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle or Adjustable Saddle (AluminumBass)
【Pegs】: Krueson Deluxe Tuner "No Line" (with post holes) or Krueson Deluxe Tuner "Single Line" (with post holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】Modern
【Soundhole Ring】Single Ring 3-ply
【Body Binding】Top: 3-ply Back: Single

 

1957

Adjustable saddles were predominantly aluminum Bass this year as well,
though some glossy ceramic saddles with large screws, seen in the late 1950s, have also been confirmed.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Bracing)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle or Adjustable Saddle (AluminumBass or Glossy Ceramic Large Screw)
【Pegs】: Krueson Deluxe Tuners "Single Line" (with Post Holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-Ply
【Body Binding】: Top: 3-Ply Back: Single

【Fret Count】: 20 xml-ph-0019@deepl.internal 【Logo】Modern xml-ph-0020@deepl.internal 【Soundhole Ring】 

1958

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle or Adjustable Saddle (Glossy Ceramic Large Screw)
【Pegs】:Crewson Deluxe Tuners "Single Line" (with Post Holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-Ply
【Body Binding】: Top: 3-Ply Back: Single

【Fret Count】: 20 xml-ph-0017@deepl.internal 【Logo】Modern xml-ph-0018@deepl.internal 【Soundhole Ring】 

1959

While large screws were the mainstream for studs used in adjustable saddles,
perhaps due to the full-scale switch to small screws starting the following year, models with small screws can also be confirmed from this year.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle or Adjustable Saddle (Glossy Ceramic Large Screw or Very Rarely Small Screw)
【Pegs】:Crewson Deluxe Tuner "Single Line" (With Post Hole)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-Ply
【Body Binding】: Top: 3-Ply Back: Single

 

1960s

1960

While small stud screws are the norm for adjustable saddles, very rare examples with large screw specifications can be found.
A major change this year was the thinner neck profile. Rarely, examples with the thicker 1959-style neck can also be found.

~Main Specifications~
【Finish】Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple(Small Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】: Straight Short Saddle or Adjustable Saddle (Glossy Ceramic Small Screw or Very Rarely Large Screw)
【Pegs】:Crewson Deluxe Tuner "Single Line" (With Post Hole)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-ply
【Body Binding】Top: 3-ply Back: Single

1961

By 1961, the J-45's standard finish became Cherry Sunburst, dramatically changing its visual impression.

~Main Specifications~
【Finish】Cherry Sunburst or (very rarely) Brown Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】:Brazilian Rosewood
【Bridge】:Brazilian Rosewood (Upper Bracing)
【Bridge Plate】:Maple (Small Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】:Straight Short Saddle or Adjustable Saddle (Glossy Ceramic Small Screw)
【Pegs】:Kluson Deluxe Tuners "Single Line" (With Post Holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-Ply
【Body Binding】: Top: 3-Ply Back: Single

【Fret Count】: 20 xml-ph-0018@deepl.internal 【Logo】Modern xml-ph-0019@deepl.internal 【Soundhole Ring】 

1962

From 1962, straight saddles were discontinued and replaced exclusively with adjustable saddles.
Although extremely rare, some instruments have been confirmed to use plastic bridge material.
Visually, the soundhole rosette began transitioning to a double-ring design.
Additionally, it is said that the bridge plate changed from solid wood to plywood,
but this could not be confirmed in this investigation and remains a subject for further research.

~Main Specifications~
【Finish】Cherry Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (upper belly) or, very rarely, plastic(upper belly)
【Bridge Plate】: Maple (small size) or Maple Plywood
【Bracing】: Non-scalloped X-bracing

【Saddle】: Adjustable Saddle (glossy ceramic small screw or very rarely wood)
【Pegs】: Kluson Deluxe Tuners "Single Line" (with post holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Single Ring 3-ply or Double Ring(7-ply + 3-ply)
【Body Binding】Top: 3-ply Back: Single

Binding: Top: 3-ply Back: Single 

1963

Plastic bridge models begin appearing in greater numbers .
The bridge plate changes from a single piece to 3-ply maple plywood, and the size increases slightly.
Saddles include glossy ceramic, as well as matte ceramic.
Across Gibson Acoustic guitars, wood saddles like ebony and rosewood also appear, increasing the variety.

~Main Specifications~
【Finish】Cherry Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (upper bout) or Plastic (upper bout)
【Bridge Plate】: Maple 3-piece(Medium Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】: Adjustable Saddle (Glossy Ceramic Small Screw or Matte or Wood)
【Pegs】:Krueson Deluxe Tuners "Single Line" (with Post Holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 43mm
【HEAD ANGLE】: 17°
【Head Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Double Ring(7-ply + 3-ply)
【Body Binding】Top: 3-ply Back: Single

 

1964

Starting in 1964, the pickguard material transitioned from celluloid to resin.
The thickness also increased to about 1.5mm, likely affecting not only the appearance but also the sound .
Additionally, the bridge plate size became even larger.

~Main Specifications~
【Finish】Cherry Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood
【Bridge】: Brazilian Rosewood (upper bout) or very rarely Plastic (upper bout)
【Bridge Plate】: Maple 3-piece (medium size) or Maple 3-piece(Large Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】:Adjustable Saddle (Glossy Ceramic Small Screw or Matte or Wood)
【Pegs】:Kluson Deluxe Tuners "Single Line" (with Post Holes)
【Pickguard】: Tortoiseshell Pattern Celluloid Large Size or Tortoiseshell Pattern Resin Large Size

【Scale】:Medium Scale
【Nut Width】:Approx. 43mm
【HEAD ANGLE】:17°
【Head Taper】: None
【Number of Frets】:20

【Logo Mark】Modern
【Soundhole Ring】Double Ring (7-ply + 3-ply)
【Body Binding】Top: 3-ply Back: Single

 

1965

1965 was a year of major transformation for Gibson as a whole.
The main changes were as follows.

- Brazilian rosewood → Indian rosewood
- Regular neck with approx. 43mm nut width → Narrow neck with approx. 40mm nut width
- 17-degree headstock angle → 14-degree headstock angle

Additionally, the tuners transitioned to double-line Deluxe tuners,
and chrome-plated rivet bushings began being used this year.

~Main Specifications~
【Finish】Cherry Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Brazilian Rosewood or Indian Rosewood
【Bridge】: Brazilian Rosewood (Upper Belly) or Indian Rosewood(Upper Bitter)
【Bridge Plate】: Maple 3-Piece (Large Size)
【Bracing】:Non-Scalloped X-Bracing

【Saddle】:Adjustable Saddle (Ceramic Small Screw Matte or Wood)
【Pegs】: Kluson Deluxe Tuners "Double Line" (with post holes) Nickel Grommets or Kluson Deluxe Tuners "Double Line" (with post holes) Chrome Grommets
【Pickguard】: Tortoiseshell Pattern Resin Large Size

【Scale】:Medium Scale
【Nut Width】: Approx. 43mm or Approx. 40mm
【Headstock Angle】: 17 degrees or 14 degrees
【Headstock Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Double Ring (7-ply + 3-ply)
【Body Binding】: Top: 3-ply Back: Single

【Fret Count】: 20 xml-ph-0024@deepl.internal 【Logo】Modern xml-ph-0025@deepl.internal 【Soundhole Ring】 

1966

The fingerboard and bridge transitioned to Indian rosewood, but
due to leftover scrap material, wood clearly resembling Brazilian rosewood is often used until around 1969.
The plating on the grommets also frequently mixes chrome and nickel.

~Main Specifications~
【Finish】Cherry Sunburst

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Indian Rosewood or Brazilian Rosewood
【Bridge】: Indian Rosewood (Upper Belly) or Brazilian Rosewood(Upper Belly)
【Bridge Plate】: Maple 3-Piece (Large Size)
【Bracing】: Non-Scalloped X-Bracing

【Saddle】: Adjustable Saddle (Ceramic Small Screw Matte or Wood)
【Pegs】: Kluson Deluxe Tuners "Double Line" (with post holes) Nickel Grommet Bushings or Kluson Deluxe Tuners "Double Line" (with post holes) Chrome Grommet Bushings
【Pickguard】: Tortoiseshell Pattern Resin Large Size

【Scale】: Medium Scale
【Nut Width】: Approx. 40mm
【Headstock Angle】: 14 degrees
【Headstock Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Double Ring (7-ply + 3-ply)
【Body Binding】: Top: 3-ply Back: Single

【Fret Count】: 20 xml-ph-0020@deepl.internal 【Logo】Modern xml-ph-0021@deepl.internal 【Soundhole Ring】 

1967


Not only did the Cherry Sunburst color change significantly,
but the J-45's color variations became more diverse, including Tobacco Sunburst, Ebony Black, Cherry Red, and very rarely, Brown.
The pickguard used for custom colors is white and screw-mounted, and the adjustable saddle is often wood.
On Cherry Sunburst models, Gotoh tuners are used in very rare cases.


~Main Specifications~
【Finish】Cherry Sunburst or Tobacco Sunburst or Cherry Red or Ebony Black or Brown

【Body Top】Spruce
【Body Sides & Back】Mahogany
【Neck】Mahogany
【Fingerboard】: Indian Rosewood or Brazilian Rosewood
【Bridge】: Indian Rosewood (Upper Belly) or Brazilian Rosewood (Upper Belly)
【Bridge Plate】: Maple 3-Piece (Large Size)
【Bracing】: Non-Scalloped X-Bracing

【Saddle】: Adjustable Saddle(Wood or very rarely ceramic small screws, matte finish)
【Pegs】: Kluson Deluxe Tuners "Double Line" (with post holes) Nickel Grommet Bushings or Kluson Deluxe Tuners "Double Line" (with post holes) Chrome grommet bushings or Gotoh-made pegs
【Pickguard】: Tortoiseshell pattern resin large size or White plastic large size screw-on type

【Scale】:Medium scale
【Nut width】:Approx. 40mm
【Headstock angle】:14 degrees
【Headstock taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Double Ring (7-ply + 3-ply)
【Body Binding】: Top: 3-ply Back: Single

 

1969

By 1969 ,
the J-45 featured 1970s specifications:square shoulders, small pickguard, long scale, nut width approx. 43mm, straight short saddle, 3-ply (black/white/black) with model name, and brown (natural finish) headstock.

The bracing pattern continues to be the single X-bracing used previously. Whether any 1969 serial-numbered instruments with double X-bracing exist remains under investigation.

~Main Specifications~
【Finish】Tobacco Sunburst or Cherry Sunburst or Custom Color (primarily Ebony Black)

【Body Top】: Spruce
【Body Sides & Back】: Mahogany
【Neck】: Mahogany
【Fingerboard】: Indian Rosewood or Brazilian Rosewood
【Bridge】: Indian Rosewood (Upper Belly or Down Belly) or Brazilian Rosewood (Upper Belly or Down Belly)
【Bridge Plate】: Maple 3-Piece (Large Size) or Maple 1-Piece (Extra Large Size) or Rosewood 1-Piece(Extra Large Size)
【Bracing】: Non-Scalloped X-Bracing (Single X)

【Saddle】: Adjustable Saddle (Wood), Straight Short Saddle
【Pegs】: Krueson Deluxe Tuner "Double Line" (with post holes) Nickel Grommet Bush or Krueson Deluxe Tuner "Double Line" (with post holes) Chrome Grommet Bushings
【Pickguard】: Tortoiseshell Pattern Resin Large Size (With Logo or Without Logo) or White Plastic Large Size Screw-On (With Logo or Without Logo) or Black Small Size

【Scale】: Medium Scale or Long Scale
【Nut Width】: Approx. 40mm or Approx. 43mm
【Headstock Angle】: 14 degrees
【Headstock Taper】: None
【Number of Frets】: 20

【Logo】: Modern
【Soundhole Ring】: Double Ring (7-ply + 3-ply)
【Body Binding】: Top: 3-ply Back: Single

 

The J-45, a legendary instrument cherished for years as "The Workhorse."
Given its profound history, the wealth of documentation left behind, and the extensive discussions surrounding it, the affection people involved with acoustic guitars hold for the J-45 is immeasurable.
Systematically compiling this information anew was no simple task, but through this writing, I was able to reaffirm the J-45's appeal.
As mentioned at the outset, our exploration of the J-45 does not end here.
We aim for further development alongside Advance Guitars' future journey.

Advance Guitars Manager Inoue

Part 1: Gibson J-45 History: Introduction to 1942–

Part 2: 1964–1969 Timeline (This Page)

Advance Guitars