Description Product Description All of the Martin Authentics in the Marquis Collection are based on existing vintage Martin instruments that have been selected for their superb tonal qualities and striking vintage aesthetics. These Authentic instruments are all crafted in the same manner as the originals to accurately replicate the tone, feel and look of an actual vintage instrument. Each vintage instrument has been thoroughly measured and X-rayed using a CAT scan machine at the Smithsonian Institute to ensure the utmost accuracy. Taking you back to the Golden Era of C.F. Martin Co., these Martin Authentics utilize hide glue adhesive throughout and employ painstaking, historically-accurate detailing that is unique to the specific vintage instrument that is being replicated. These instruments are truly exquisite, and have been made with the discerning player and vintage-enthusiast in mind.This particular D-18 was modeled after an actual 1939 D-18 that can be found in the Martin Museum. To produce that warm, broken-in vintage sound that you'd typically only hear in an actual vintage instrument, the D-18 Authentic 1939 is made with genuine mahogany back and sides along with a solid Adirondack spruce top and authentic-style 1939 rear-shifted bracing. To faithfully re-create the sonic splendor of the late '30s D-18, the top and braces are both treated with Martin's exclusive Vintage Tone System, which takes the historic torrefaction system to all new levels of vintage accuracy by targeting specific time periods. The Vintage Gloss finish on the top, back, sides and neck give this D-18 Authentic 1939 a gracefully aged look to match its vintage tonality. The genuine mahogany neck is shaped into an accurate 1939 profile and features a period-correct headstock with an authentic 1939 taper, a solid Madagascar rosewood headplate and a large Golden Era style logo.Other vintage-correct features include an Old Style 18 rosette, Madagascar rosewood back purfling, tortoise color b