Jaimie Muehlhausen // Vibrosonic Design
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Any Sigma Martin fans out there? Love these guitars! DM-3M, DM-18, early/mid 1980s : r/AcousticGuitar
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Sigma by Martin | Vintage Guitar® magazine
Amazon.com: SIGMA 41” Acoustic Guitar, Dreadnought, 4/4 Full-Size, with Name Brand EXP16 Strings, Solid Mahogany Top, Natural Gloss, Mahogany Back & Sides, Right(30D) : Musical Instruments
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Amazon.com: SIGMA 40” Acoustic Guitar, OOO, 4/4 Full-Size, with D'Addario EXP16 Strings, Solid Spruce Top, Vintage Tinted Gloss, Mahogany Back & Sides, Right(10A) : Musical Instruments
Sigma 000M-15 Mahogany Acoustic Guitar at Gear4music
The Ultimate Parlour Guitar? | Sigma Special Edition 00K2-42S - YouTube
1990s Sigma SDR-41 Dreadnought Guitar
