Proteus frames were popular here in Central KY because of a local builder/mechanic who worked for them...Steve Bishop. He was later involved with the short-lives Huffy high end cycle venture, and was , I believe, a mechanic for the US National junior teams and Motorola. They were well-made frames, IMHO, but sorry to say I don't know anything about the numerical ID of their builders. Doug Wagner Richmond,KY
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