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File:Stauffer Style Guitar (1834) Christian Frederick Martin - Martin and Coupa Guitar (c.1835-1839) neck - C.F. Martin Guitar Factory 2012-08-06 - 006.jpg - Wikimedia Commons
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File:MGOCD-03 175th Anniversary Custom Martin Guitar 2008 SN.1270841 (Robert Goetzl).jpg - Wikimedia Commons
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