Martin Sigma GCR-7 Grand Concert 000 Acoustic Electric Guitar '74

Martin Sigma GCR-7 Grand Concert 000 Acoustic Electric Guitar '74

VINTAGE 1970 ACOUSTIC MARTIN SIGMA GUITAR RARE GCS-7 / GCR-7 ZERO

Sigma Guitars - Legendary Acoustic Guitars

Sigma Right-Handed Acoustic Guitars

This one might be one of the BEST examples of this model. It is a 1974 to the best of my knowledge, due to the serial number: 74122057, on a purple

Sigma GCR-7 1974 Natural (1970-1983 Japanese era)

This one might be one of the BEST examples of this model. It is a 1974 to the best of my knowledge, due to the serial number: 74122057, on a purple

Sigma GCR-7 1974 Natural (1970-1983 Japanese era)

Martin Ebony Guitar Center

VINTAGE 1970 ACOUSTIC MARTIN SIGMA GUITAR RARE GCS-7 / GCR-7 ZERO

1970s Martin Sigma acoustic GCR-7 Japan - NO RESERVE

SIGMA 41” Acoustic Guitar, Dreadnought, 4/4 Full-Size