![]() The headstock shape was also modified, tapered to more resemble a Martin guitars headstock.Īs is tradition in classical instruments, Sigma classical guitars do not have the headstock logo, and one must rely on the inner label for identification. ![]() 1970' underneath in a smaller block font. By the mid 1970's (c1976) the headstock logo design changed to utilize a gold 'Martin style' decal stating 'Sigma Guitars' in script with 'Est. Interestingly, 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.' The early 70s models (1970 -1975) can be distinguished by a square, shaped similarly to that of a spatula, the logo consisting of a gold decal with the single word SIGMA surmounted with the Σ symbol (the Greek letter sigma), in. Headstocks & Logos Sigma guitars made in Japan from 1970 through 1983. The DM-5 and DR-7, as well as other early models continued to be built during this time as well. In 1980, 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. ![]() D for, R for, M for and the number denoting the grade of wood, 5, 7, 9, 11, 15.Ĭitation needed Construction moved from Japan (1970–83), to Korea (1984-93/94), and finally Taiwan (1993–2007). Dreadnought models DM-5 and DR-7 are the most common early Sigma guitars until the late '70's. The first Sigmas were typically dreadnought, although Grand Concert Series (GCS) and classical models were also produced from the early 1970s (1971) onward. ![]() History Initial construction was in Japan by various manufacturers/factories from 1970 through 1983. Modifications: added black heavy duty strap buttons.Contents. The frets are in great shape with no major grooves or divots from use and it plays beautifully up and down the fingerboard with no dead spots or choking out. The neck is straight, the truss rod is fully functioning and the action has been setup low and comfortable. Playability: Our in-house guitar tech has just inspected, setup and restrung this guitar with a new set of 12s. Pickups/Hardware: No electronics, original closed back tuning keys, ebonized bridge, pearl dot inlays, single ply black pickguard, adjustable truss-rod, black heavy duty strap buttons.Ĭosmetics: This Sigma is in great shape for its age – there are light pick scratches on the pickguard, no major dings, dents or scratches to mention, just a few light scuffs that you can only find by searching & holding the guitar up in the lights. Neck: Mahogany neck with a rosewood fingerboard, 14 frets to the body, pearl inlays, 25.5” scale length, 1 11/16” nut width, 20 frets. The top has multi-ply b/w/b binding and the back has black binding. This guitar will ship in a nice chipboard case.īody: Full Dreadnought with an X braced spruce top and mahogany back & sides. This instrument is in fine used condition with a nice full neck and we just set it up with a new set of 12’s – the action is low & it plays great up & down the fingerboard. Sigma guitars were made by Martin overseas and this one is probably from the late 1980’s. Summary: This full bodied dreadnought acoustic guitar has that classic D-18 X-braced tone at a great price.
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