Retros are the original Nickel acoustic string all the way from the 1930s. Retro strings offer a uniquely mellow, yet crisp sound that allows your guitar's natural tonewoods to be heard. 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. Martin’s proprietary wrap wire is naturally corrosion resistant and it is incredibly strong. Martin also employ's a sophisticated winding process that controls the coupling between the core and wrap wire to maximize intonation.  

• String Gauges: 013 .017 .026 .035 .045 .056
• Martin's proprietary SOLID Nickel/Copper alloy blend
• Provides for a reduced pick attack allowing the guitar's tone woods to be heard
• Offers uniquely mellow, yet crisp, sound.

Martin Item No. 41Y19MM13, MM13

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