The last three numbers are the unit number. These rare, hard to find models were actually made in Japan and imported to, and guaranteed by Levin in Sweden. The system of numbering at the Brooklyn Gretsch factory was approximate at best and many inconsistencies exist in both serial numbers and product line specifications.


They are distributed and sold in the U. Since there are examples of consecutively numbered instruments with different specifications, it appears that the serial numbers were not applied simply to batches of instruments. The third letter is an internal code for Japan.

Sigma Guitar Dating

Current documentation taken from the files at Martin indicate these models were produced by the Kasuga Gakki company as overload for the Tokai Gakki company. All other text was printed in black ink, or stamped on in ink by the manufacturer model and serial numbers. These labels replaced the method of penciling the serial number on the inside back of the guitar.

Some banjo models have the serial number stamped on the inside of the rim. Just five digit numbers in sequence. Numbers can be found stamped in ink on the inside of the instrument back wood or on the Gretsch label itself.

It being a smaller, local store, the instrument may have been sitting there for a while before I acquired it. Other physical indicators or attributes, such as finish, trim, tuners, etc. The issue of whether or not Sigma guitars are solid wood or laminate wood has been a source of controversy and confusion for many years now.

  • The first, and or, first and second number identifies the numerical month of production.
  • Alternate serial number configurations for Yamaha Classical and Acoustic Guitars.
  • There are many exceptions and sometimes letter prefixes were used.

Under the best of circumstances, Sigma serial numbers can only provide an indicator of the year when a particular model was built. The top wood is another matter entirely. The first two numbers indicate the day of the month. Serial numbers on Yamaha guitars repeat every ten years due to the way they are formed. The first letter indicates the last digit of the year of production.

Martin Guitar Serial Numbers
C.F. Martin & Co

From Wikipedia, the free encyclopedia. Other Sigma instruments included mandolins, banjos, acoustic and electric basses and solid body and hollow body electric guitars. In other projects Wikimedia Commons. This article relies too much on references to primary sources. The letter at the beginning represents the month, legal separation and so J would be March see chart above.

The model and serial numbers were usually stamped on in ink, but some are known to have been hand-penned. The earliest examples had a plain black on white inner paper label giving the model and serial numbers. Solidbody models with control plates have the label somewhere inside the control cavity. It was, after all, the depression. This may be due to them being built in several Japanese factories at the same time with no coordination in the serial numbering system.

The first letter is an internal code. The remaining numbers identify the sequential yearly factory unit number, and include all instruments, in all models, built in that factory, in that specific year. After workers at the Nazareth factory had been employed for a period of years they were permitted to fashion an instrument for themselves at the plant.

Gibson Serial Numbers

After all models were given a name and a model number. Changes included cutaways on archtops, natural finish on some f-hole guitars and mandolins, and a line of nylon string acoustics. The only way to be clear, have is to have an understanding of the feature sets of the instruments from the era.

Sigma Guitars - History

The serial number would properly indicate the actual date of the guitar. Other Sigma instruments included mandolins, banjos, acoustic and electric Bass guitar basses and solid-body and Semi-acoustic guitar hollow body electric guitars. These guitars are all currently being produced in China.

Sigma Guitars

Serial Number Chart

  1. Most F-hole models have the label on the inside back and can be seen through the f-holes.
  2. Serial numbers for Sigma guitars built in Korea and Taiwan are perhaps meaningless, though again some seem to indicate the year of manufacture e.
  3. No year of manufacture can be determined.

Martin Guitar Serial Numbers

Sigma's made in Japan from through used a paper label to identify the model and serial number of the instrument. The third letter is the month. Please improve this by adding secondary or tertiary sources. The original factory brochure also states components were processed and finished on the same production line as regular Martins. Early Korean made guitars show this same brand, only Made in Korea in place of Japan Serial Numbers Sigma serial numbers do not provide an indicator of the year in which a particular model was built.

Reverb News

Martin Guitar - Serial Number Lookup

The second letter indicates the month. The final letter is an internal code. Hopefully, this will help many of you! Obviously, with the change of the decade, there is plenty of room for confusion in interpreting the numbers.

Product Dating & Value

Martin Guitar Serial Numbers When Was Your Martin Guitar Built
Martin Guitar Serial Numbers When Was Your Martin Guitar Built
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This updated system utilizes an impressed eight digit numbering scheme that covers both serializing and dating functions. Martin and featured solid wood top. These guitars are thoroughly inspected and prepared by Martin craftsmen at our factory and carry a limited lifetime warranty.

There is still some discussion as to why Gretsch may have used this non-conforming numbering scheme during this period on these instruments. This article needs additional citations for verification. These models have saddles with each string individually compensated, culture yielding superb intonation. These models were produced in very limited quantities.

The first letter is an internal code both I and S were used. Yamaha Corporation of America Orangethorpe Ave. Sigma serial numbers do not provide an indicator of the year in which a particular model was built.

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