Martin's relationship with John Mayer goes back almost 20 years when they released the first limited edition OM-28JM in 2003. The overwhelming success of that model led to the creation of the more affordable OMJM Special Edition and it's been a mainstay of the Martin collection for several years.
Essentially an OM-28 built on their Hybrid X Scalloped brace platform with an Englemann spruce, the OMJM has a snappier, quicker response than a stock OM-28. It's also voiced to respond well with Martin's Gold Plus electronics system. All in all , this is a guitar that work well at home, in the studio and on stage.
Actual guitar color and wood grain may differ slightly from pictures.