Pure Nickel wound strings were used exclusively on so much guitars inbuilt Fifties and many of the Sixties. Pure Nickel has a reasonably warmer tone than nickel-plated steel and is most well-liked by many blues artists.
Pure Nickel Wound strings are created by wrapping Pure Nickel alloys around a hex-shaped core wire which is made out of tin-plated high-carbon steel (same as plain strings, but hex-shaped).
Hand-crafted guitar strings
Very comfy playing feel, superb sound
Even if uncoated long playable