I bought this 1978 Sigma Guitar off of Ebay. Got it for about $200 (+ another $200 for shipping from Portland to Chicago!) It had not arrived yet but I would like
Sigma Guitars - Wikipedia
Episode 219 - Sigma Guitars — The High Gain
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An Introduction to Sigma Guitars | guitarguitar
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Sigma Guitars - Legendary Acoustic Guitars
Jaimie Muehlhausen // Vibrosonic Design
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Jaimie Muehlhausen // Vibrosonic Design
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Sigma by Martin | Vintage Guitar® magazine
