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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 DM-18 Review | Martin's Best Copy? | Vintage Acoustic Guitar | Sigma Korea Guitar 1980's - YouTube
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Sigma DM-18, D-18 Dreadnaught, Martin, JAPAN, SOLID Top, OHSC, Excellent Condition & Player! | Reverb
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