Replay Guitar Exchange is pleased to be able to offer you the real deal. Martin Retros are the original Nickel acoustic string – the real deal – all the way from the 1930s. Retro strings offer a uniquely mellow, yet crisp, sound that allows your guitar’s natural tone woods to be heard, not overshadowed. They are crafted with Monel, a solid Nickel/Copper wrap wire - not nickel-plated - meaning there is no chance for defects in the plating to allow for corrosion. Instead, Martin’s proprietary wrap wire is naturally corrosion resistant and it is incredibly strong. Martin also employs a sophisticated winding process in the making of their Retro String that controls the coupling between the core and wrap wire to maximize intonation.

Martin’s MM13 is their medium gauge set with .013 - .017 - .026 - .035 - .045 - .056 strings.