From Martin:

1937 was an excellent year for guitars with a perfect storm of craftsmanship, innovation, and materials. This Authentic Series replication of a 1937 D-18 stays true to the original with hide glue construction and historically accurate detailing. This guitar features genuine mahogany back and sides and an Adirondack spruce top, and it includes an Authentic circa 1937 bracing pattern. It includes period-correct “18” Authentic-style appointments and an Authentic neck barrel and heel, and new this year, a more accurate body profile based on dreadnought shapes from the early Golden Era of Martins history. Martins VINTAGE TONE SYSTEM (VTS) is employed to age the top and braces, which captures the tone from the 1930s era. Martins craftspeople can recreate the pleasing visual aesthetics of a vintage guitar and reproduce the particular tones previously reserved for vintage instruments.”

Vintage Gloss Natural, Authentic D-14 Fret body shape, Solid Adirondack Spruce top w/VTS, Scalloped forward shiftedAdirondack Spruce with VTS X bracing, Old Style 18 multi-stripe Rosette, Solid Mahogany back and sides,Madagascar Rosewood back purfling,Brown Tortoise patternbinding with the multi-stripe top inlay, Ebony fingerboard with the Old Style 18 Abalone position markers on an Authentic 1937 w/standard taper shaped Mahogany neck, 25.4 scale length, 1 3/4″ nut width, Waverly tuners, With hardshell case