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Not a Martin guitar, but I'm going to be using these Retro Monel strings exclusively! They're beautiful! : r/martinguitar
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Martin Retro Monel Acoustic Guitar Strings Review - Harley Benton Custom Line CLP-15E Exotic Koa - YouTube
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Product Review: C. F. Martin & Co.® RETRO Acoustic Strings Light 12 MM12 Monel - Guitar Girl Magazine
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