The all Mahogany Martin 15 series dates back to 1939. The modern 000-15m is an auditorium-sized acoustic with few visual embellishments. This guitar, for example, lacks binding on the body and fingerboard. The original 000-15 (introduced in 1999) was renamed the 000-15m in 2010.Years of Production: 1999 - present. Wood Composition: Mahogany back, top, and sides, Rosewood fingerboard. Design Elements: Tortoiseshell pickguard, unbound fingerboard, dot inlays, A-frame bracing