Details: When Martin introduced the OM-28JM John Mayer Signature Edition in 2003, people who had heard of John Mayer – and even those who hadn t – were enchanted by the guitar. It featured a fast neck, an ultra-responsive Engelmann spruce soundboard, silver-color line inlays and accents at the bridge and headstock, and distinct fingerboard inlays that proved as popular as the guitarist who designed it. The limited run of 404 instruments sold out completely.As Mayer s fan base and reputation continued to grow, the number of OM-28JM John Mayer Signature guitars produced began to look awfully small. So, C.F. Martin Co. asked John Mayer if he would collaborate on a second namesake guitar, one that embodies many of the same features and attributes as his first, but one that would be more affordable and more widely available in the tradition of the wildly popular 000-28EC Eric Clapton.For the OMJM, the East Indian rosewood back and sides are complemented by an incredibly responsive Engelmann spruce soundboard that s enhanced by scalloped scalloped X bracing to produce a rich, warm, full-bodied acoustic voice. The entire body benefits from the flawless look of a gloss finish while the top is also treated with antique toner to provide a gracefully aged aesthetic. The headstock boasts an East Indian rosewood headplate that displays a set of nickel open geared tuning machines with butterbean knobs and an old style Martin logo in silver as opposed to the familiar gold (another nod to the OM-28JM). Appointed similarly to its predecessor, the OMJM features a Style 45 rosette that boasts a lustrous center ring of colorful abalone shell, a bold herringbone top trim, black white back inlays, a Zig-Zag back strip down the center, grained ivoroid binding throughout, and a traditional faux tortoise pickguard. The select hardwood neck features a diamond volute, and for superb playability and comfort, the neck combines a 1-11 16 width with the low profile shape to facilitate eas