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Amazon.com: Martin Guitar OMJM John Mayer Acoustic-Electric Guitar with Hardshell Case, Spruce and Rosewood Construction, Gloss Finish, and 000-14 Fret : Musical Instruments
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John Mayer wields ultra-rare Martin double-neck acoustic guitar at first solo arena tour show | Guitar World
Review: Rock star John Mayer wins over St. Paul crowd with conviction, personality and acoustic tunes
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