1974 Martin Sigma Sbg2-9 (I think) What can you tell me about this guitar? What it might be worth? I am not finding much online. I have read that they only made
Martin Sigma electric last... - Delta Blues Vintage Guitars | Facebook
Used Sigma By Martin DM-1 Made in Korea Dreadnought Acoustic Guitar | eBay
Martin Sigma SG SBG2 1972/1974 Vintage and original | Reverb Austria
Martin Sigma DT-3 Vintage MIK Korea Acoustic Guitar 1970's Figured Chestnut | eBay
Martin Sigma electric last... - Delta Blues Vintage Guitars | Facebook
Sigma by Martin | Vintage Guitar® magazine
VintageSilvertones.com - For Sale
Martin Sigma electric last... - Delta Blues Vintage Guitars | Facebook
Just Guitars Australia - Martin-Sigma E-18, circa 1981
Just Guitars Australia - Martin-Sigma E-18, circa 1981
Used Sigma Martin DM3 Dreadnought Natural | Cream City Music
1974 Martin / Sigma SBG2-9 Electric Guitar (210 of 250 made) | Reverb
Sigma Electrics 1973/4 | RealMarshall
1981 Martin Sigma SE-28 Acoustic Flattop w/ Cutaway Natural > Guitars Flattop Electric & Acoustic | Rivington Guitars
Just Guitars Australia - Martin-Sigma E-18, circa 1981
Sigma DC-10EQ Acoustic/Electric Guitar — Morris Guitar Company
Sigma by Martin TB-1N Thin-Body OM/000 Acoustic / Electric w/ Cutaway, Natural - Previously Owned - Bill's Music
Vintage Martin Sigma DM-4S Acoustic Guitar - musical instruments - by owner - sale - craigslist
Sigma By Martin Guitar Electric Acoustic for Sale in Gilbert, AZ - OfferUp
Sigma Dreadnought DM-3 Guitar by C.F. Martin & Co. | eBay
E-18/E-28 Series | RealMarshall
Martin Sigma SG SBG2 1972/1974 Vintage and original | Reverb
Sigma 00M-1SL-SB Acoustic Left Handed, Sunburst at Gear4music
sigma/martin sbg2-6 electric guitar 1974 red | Reverb Lithuania
Used Sigma Martin DR-35N Natural 2002 | Cream City Music
MARTIN PROTOTYPE SIGMA ELECTRIC GUITAR CIRCA 1979-1980. THIS IS AN EXTREMELY RARE PROTOTYPE MADE - Able Auctions
Sigma Les Paul 1970's Sunburst Guitar For Sale Twang
Martin Sigma SG SBG2 1972/1974 Vintage and original | Reverb
