Sigma Guitars is a guitar manufacturing brand originally released by C.
Martin as a line of guitars at affordable prices to compete with the increasing number of imported guitars from Japan and elsewhere.
The Sigma line was discontinued by Martin in 2007.
The rights to the name was acquired by German company AMI Musical Instruments GmbH, which relaunched the brand with guitars being produced.
, Sigma by Martin DT-4N spruce top with Chesnut back and sides.
Guitar has a great tone and is well balanced.
Recently set up with Martin Lifespan strings 12-54 gauge.
Action was set very low.
Has a few dents and dings, but no issues with playing.
Will ship UPS ground fully insured to lower 48.
, We specialize in Asian import guitars in general and in Sigma by Martin guitars in particular.
Dunham Specialties IS NOS Sigma Martin Guitars and we have been researching the field, blogging ( Sigma Martin Memo’s), documenting and writing about Sigma by Martin fretted instruments for nearly 10 years.
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, This guitar is a Sigma by Martin which was produced to compete with the lower priced asian models.
D – Dreadnought.
R – Rosewood.
28 – Designed after the “classical” D – 28 Martin.
Made in Japan 1977 until 1982 when production moved to Korea.
The logo on the head actually says ” Sigma by Martin Est.