Martin GPCX1AE 20th Anniversary NaturalIn 1999, Martin broke into the world of alternative materials and created a whole new class of high quality guitars: the X Series. In the 20 years since, the X Series has evolved to include multiple design changes and alternative materials. This Grand Performance model, featuring a solid hardwood neck, mother of pearl pattern fingerboard and rosette inlay, and morado fingerboard and bridge, harkens back to the earliest days of the X Series. Timeless