The headstock shape was also modified to a deeper taper and shaped to resemble the Martin instruments. 1970' underneath in a smaller block font. By the mid 1970's (c1976) the headstock logo design changed to a gold 'Martin style' decal that said, 'Sigma Guitars' in script with 'Est. On right-handed models while playing a Sigma guitar the 'sideways M' becomes 'right side up' suggesting 'M' for Martin. The sigma symbol is often described as a 'sideways M.' While retaining the same early logo for several more years (c1975/76) the peghead itself began to take on a more tapered shape by 1972. The early 70s models (1970 -1975) can be distinguished by a more squared peghead, shaped similarly to that of a 'spatula.' The logo consisting of a gold decal with the single word in block lettering SIGMA surmounted with the Σ symbol (the Greek letter sigma), in mother of pearl. Sigma guitars made in Japan from 1970 through 1983. The 'First Generation' DM-5 and DR-7 (laminate wood bodies and tops,) as well as other early models (e.g., the GCS-7/CS-7) remained in production during this time as well. They are called 'Second Generation' Sigma's by C.F. In 1978, model designations were added to capitalize on Martin model numbers: the DM-18, DM-19, DR-28, DR-28H, DR-35, DR-41, and DR-45. Ĭonstruction moved from Japan from 1970–1983, to Korea from 1984-1994, to Taiwan in 1994 (made in both Korea and Taiwan for the 1994 model year) and finally Indonesia (?–2007).
Though other models were produced the most common two throughout the '70's were the Dreadnought models DM-5 (DM12-5) and DR-7 (DR12-7.) D for dreadnought, R for rosewood, M for mahogany and the number denoting the grade of wood, 5, 7, 9, 11, 15.
SIGMA MARTIN GUITAR SERIAL NUMBERS SERIES
The first Sigmas were typically dreadnought acoustics, although Grand Concert Series (GCS) and classical models were also produced from the early 1970s (1971?) onward. Initial construction was in Japan by various manufacturers/factories from 1970 through 1983. distributor is now Six String Brokerage LLC, Nazareth, Pa. They are distributed and sold in the U.S. Louis Music of Missouri, AMI is not allowed to use the brand name 'Sigma' in the U.S.
prior to selling the brand to AMI, and had since been picked up by St.
rights to the Sigma brand name and trademark had been allowed to lapse by C.F. In 2011 the German company 'AMI Musical Instruments GmbH' purchased the rights to the name and relaunched Sigma Guitars again, this time being produced in China. Jump to navigationJump to search 1980 Sigma D-10 Anniversary Guitar
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