- Gauges:.013, .017, .026, .035, .045, .056
- Core Material:Tin-plated Steel
- Winding Material:Monel (nickel/copper)
- Winding Type:Round
Martin Retro acoustic guitar strings are the original, real-deal nickel acoustic strings straight out of the 1930s. Retro strings offer a uniquely mellow yet crisp sound that allows your guitar’s natural tonewoods to be heard, not overshadowed.