Tenor Guitars · 1927 To The 1960s
Martin Tenor Guitar History And Model Changes
Martin’s tenor line began with small size-5 guitars in 1927. The next few years changed the body and neck relationship, leading to the 14-fret 0-18T and a better-placed bridge. Later additions brought all-mahogany bodies and simpler Style 15 versions.

- Size-5 Tenors
- From 1927
- Regular 0-18T
- 1930
- All-Mahogany 0-17T
- 1932
- 5-15T Replaces 5-17T
- 1949
- 0-15T Production
- 1960 To 1963
Models Covered In This Article
- 5-17T
- 5-21T
- 2-17T
- 2-18T
- 2-28T
- 0-17T
- 0-18T
- 0-28T
- 0-15T
- 5-15T
Model Changes By Year
| Year Or Period | What Changed |
|---|---|
| 1927 | The tenor family began with size-5 models, including the mahogany 5-17T and spruce-and-rosewood 5-21T. |
| 1928 | The 2-18TL used a 14-fret neck on an earlier body outline, which placed the bridge high on the top. |
| Late 1929 | The Carl Fischer tenor shortened the upper body to expose fourteen frets while improving bridge placement. |
| 1930 | The redesigned size-0 tenor entered the regular line as the 0-18T. Its upper bout became wider and flatter. |
| By 1931 | The 0-18T’s straight bridge gave way to a belly bridge. |
| 1932 | The 0-17T added an all-mahogany option in the larger tenor body. |
| 1949 | The 5-15T replaced the 5-17T with simpler Style 15 appointments and finish. |
| 1960 To 1963 | The 0-15T offered the larger mahogany tenor with plain appointments and a satin finish. |
1927: The Size-Five Tenors
The early tenor line used Martin’s small size-5 body with four strings. The 5-17T had mahogany for the top, back and sides, while the 5-21T combined a spruce top with rosewood back and sides.
These models supplied guitar bodies for musicians moving from tenor banjo. The 1927 size-5 instrument shown here belongs to that first period. Scale lengths were not identical across every tenor model and later version, so a single measurement should not be assigned to the entire family.
1928 And 1929: Fourteen-Fret Experiments
The 1928 2-18TL put a 14-fret neck on the earlier body outline. This moved the bridge high on the top. The design provided more frets clear of the body, but the resulting bridge position prompted a different body solution.
The late-1929 Carl Fischer tenor shortened the upper body instead. This preserved access to fourteen frets while allowing a more suitable bridge position. The change anticipated the shortened upper-body approach that became familiar on later Martin 14-fret guitars.

1930 And 1931: The Regular 0-18T
The redesigned tenor entered the regular Martin line as the 0-18T in 1930, following earlier development and examples recorded in 1929. Its upper bout became broader and flatter than the earlier form.
By 1931, a belly bridge had replaced the straight bridge on the 0-18T. The new body and the new bridge were distinct steps in the model’s development. The tenor line’s 14-fret history therefore begins before the general 1934 change often associated with Martin six-string models.
1932: The All-Mahogany 0-17T
The 0-17T added a larger all-mahogany tenor in 1932. It offered a different material and decoration package from the spruce-topped 0-18T while using the size-0 tenor family.
The T suffix identifies the tenor branch. Body size and style still distinguish the models within it; 5-17T and 0-17T are not interchangeable names for the same guitar. The Martin model-number guide explains the size, style and suffix system.
1949 To The 1960s: The Style 15 Models
The 5-15T replaced the 5-17T in 1949. It retained the small mahogany body while adopting the simpler Style 15 finish and appointments.
The larger 0-15T was produced from 1960 to 1963, also using mahogany with plain appointments and a satin finish. These were later model additions and replacements, not evidence that every earlier tenor received a new designation.
Did Martin Tenors Become Fourteen-Fret Guitars In 1934?
The tenor line followed an earlier sequence: the 2-18TL experiment in 1928, the shortened Carl Fischer body in late 1929, and the regular 0-18T in 1930. The general six-string 1934 chronology does not describe that development.
Is A Plectrum Guitar The Same As A Tenor?
Both can have four strings, but the plectrum design uses a longer neck and scale associated with plectrum-banjo playing. Martin’s plectrum models followed a separate, much shorter regular-production history.
Martin Identification Resources
- Plectrum Authentication
Compare the longer four-string family before identifying by tuning.
- Martin Headstock Logos
Check whether a missing or changed decal fits the instrument’s period.
- Martin Tuner Dating
Compare fitted machines with unused holes and mounting impressions.
- Martin Serial And Model Numbers
Find the production year from the neck-block serial.
- Martin Construction And Dating
Follow changes in bridges, necks, braces and materials.
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Photo Credits
Photographs from the Joe’s Vintage Guitars archive. Each caption identifies the instrument shown, including comparison photographs.
