Logging these to get an idea of the years of production.
1988
1991
1992
1993
1996
1997
Production may have begun in Korea as early as 1980 ?
And according to this article in Vintage Guitar Magazine, production partly shifted from Japan to Korea in the 80s I believe, but guitars were made in both countries for many years making this much more confusing.
Sigma by Martin | Vintage Guitar® magazine
1988
1991
1992
1993
1996
1997
Production may have begun in Korea as early as 1980 ?
And according to this article in Vintage Guitar Magazine, production partly shifted from Japan to Korea in the 80s I believe, but guitars were made in both countries for many years making this much more confusing.
Sigma by Martin | Vintage Guitar® magazine
Last edited: