From the Price Guide

Overview

Sigma started as a lower-end import brand for Martin in the '70s. The DR-7 was a dreadnought with Rosewood back and sides (hence the DR in the title). Sigmas were built in Japan from 1970 until 1983, and those from this era as considered the best. 

Years of Production: 1970 - 2007

Wood Composition: Rosewood back and sides, Spruce top

Product Specs

Brand
Model
  • DR-7
Finish
  • Sunburst
Year
  • 1970 - 1983
Made In
  • Japan
Categories
Back Material
  • Rosewood
Body Shape
  • Dreadnought
Finish Style
  • Gloss
Fretboard Material
  • Rosewood
Neck Material
  • Mahogany
Number of Strings
  • 6 String
Right / Left Handed
  • Right Handed
Sides Material
  • Rosewood
Top Material
  • Spruce
Wood Top Style
  • Plain
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