This OM-18 from Martin's Custom Shop features an Adirondack top, 1/4" Adirondack "Golden Era" bracing, mahogany neck with "Modified Low Oval" profile, ebony fingerboard with old style 18 inlays, bone nut with 1 3/4" width, ebony bridge with drop-in compensated bone saddle, and Grover nickel tuners.