A limited edition Martin John Mayer 'OMJM' signature flat top electric acoustic guitar, number 66, 2006, American made, serial number 1136444, number 66, OM shaped 'X' braced top, solid Englemann spruce top, solid East Indian rosewood back and sides, mahogany neck, ebony fingerboard and bridge, Herringbone binding to soundboard, zigzag back strip to rear, hand-laid abalone rosette, unique 'dots and diamond' inlays to fingerboard and a 'John Mayer' inlaid signature to 20th fret position, nickel-plated, open-geared butterbean-style Grover machine heads, silver pre-war style Martin insignia to rosewood headstock veneer, Martin 'Cabernet' hard case with stitched 'JMC' insignia to exterior