I have a Martin Sigma DR-15 S/N 35039 I bought brand new in 1978. This has been and remains a sweet sounding guitar. The neck is as straight as the day I bought it. I have kept the guitar tuned low to reduce stress to the neck over the years. It has pearl snowflake fret board buttons, Solid spruce top, looks like walnut sides and split back with special inlay in the back seam. It is made in Japan. The edges of the guitar have a Herring bone inlay, abalone inlay around the hole, ebony pegs and rosewood fretboard. Does anyone know anything about this guitar? I wouldn't sell it for anything and everyone who plays it wants to keep it. I would say this has been the best investment I have ever made in guitars. How much is it worth, and any history on it would be nice. I am shopping for another one just like this one but I cannot find any information let alone another DR-15.

Bob Spradlin