From Martin:

“The D15M model continues the Martin tradition with solid mahogany construction and a rich satin finish. Satisfy your desire with an affordable solid wood guitar that is visually distinctive and innovative. Due to material availability this guitar is designed with either a tortoise pattern or black pickguard. Selection may vary.”

Dark Mahogany, D-14 Fret body shape, Solid Mahogany top, Non-scalloped X bracing, Multi-stripe Rosette, Solid Mahogany back and sides, East Indian Rosewood fingerboard with the Abalone short pattern Diamond and Squares position markers on a modified low oval w/standard taper shaped Mahogany neck, 25.4″ scale length, 1 11/16th nut width, With the softshell case