File:Stauffer Martin (c.1838), Christian Frederick Martin, New York - Viennese Stauffer style early C. F. Martin guitar (vertical).jpg - Wikimedia Commons
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File:Johann Stauffer Terz Guitar (c.1820-1830), Vienna Stauffer-style guitar by C. F. Martin, Sr. (1834-1835) - C.F. Martin Guitar Factory 2012-08-06 - 004 (clip).jpg - Wikimedia Commons
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