Martin Standard Series D-18 Acoustic Guitar | 1933 Ambertone FinishThe Martin Standard Series D 18 dreadnought guitar owes its name to an enormous, heavily armed battleship that first set sail in 1906, but it wasnt until the early 30s that C. F Martin started churning out the highly sought after cannons that forever changed the shape of American folk music. The D 1, which eventually became the D 18, was the less expensive option, but many musicians found that they preferred them over the more expensive overtone laden