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🎸 Rediscover your guitar’s true voice with Martin Retro Strings — where vintage tone meets modern durability.
Martin Retro Acoustic MM13 Medium-Gauge Guitar Strings feature a corrosion-resistant Monel nickel-copper alloy wrap wire designed for long-lasting tuning stability. With a medium gauge range of 0.013" to 0.056" and a tension of 190.94, these strings deliver a warm, balanced tone ideal for finger-style blues, Americana, and bluegrass. Engineered to highlight your guitar’s natural wood resonance, they are the professional’s choice for authentic vintage sound and reliable performance.









| ASIN | B07SH2LBS6 |
| Body Material Type | Nickel |
| Brand | Martin |
| Brand Name | Martin |
| Coating Description | coated |
| Coating description | coated |
| Color | Medium |
| Colour | Medium |
| Customer Reviews | 4.6 out of 5 stars 2,056 Reviews |
| Finish Type | Copper |
| Global Trade Identification Number | 00729789552943 |
| Instrument | Acoustic Guitar |
| Item Type Name | Acoustic Guitar Strings |
| Item Weight | 23 Grams |
| Manufacturer | CF Martin & Co. |
| Manufacturer Part Number | 41Y19MM13-U |
| Material Type | Nickel, Copper |
| Model Name | MM13 Retro Monel Strings |
| Model Number | MM13 |
| Recommended Uses For Product | Playing acoustic guitar, rigorous practice, and performance |
| Set Name | Martin retro acoustic guitar strings medium |
| Sound Profile | warm natural tone |
| String Gauge | Medium |
| String Material Type | Nickel |
| String gauge | Medium |
| String material type | Nickel |
| UPC | 729789552943 |
| Unit Count | 1 Count |
| Warranty Description | Please contact manufacturer. |
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