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File:Sigma 12 string head.jpg - Wikimedia Commons
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Lot - SIGMA MODEL DT 12-4 MARQUIS TWELVE-STRING ACOUSTIC GUITAR With sunburst finish. Original hardshell case. Plays beautifully.
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Martin Sigma DM12-4 12 String Dreadnought Mahogany w/Piezo! | Reverb
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Vintage Sigma DM12-5 12-String Dreadnought Acoustic Electric Guitar in Natural | Cream City Music
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1970 Sigma By Martin DM3-12 Natural 12 String Acoustic Guitar | Lot #84012 | Heritage Auctions
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Sigma 1 Series DM12-1 12-String - natural Acoustic guitar & electro
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Sigma 12 String Flattop Guitar | Your Music Store on the Central Coast in Los Osos, California
SIGMA GUITARS DM 12-1 ~ 12 STRING ACOUSTIC KOREA GOOD CONDITION sn#9302000006 | eBay
DM12E – Sigma Guitars
DM12E – Sigma Guitars
Sigma JR12-1STE review | MusicRadar
Sigma Guitars DM12E | MUSIC STORE professional
Martin Sigma DT12-4 12 String | Reverb
