Campagnolo 1051 Record Pista Model. Early edition with no date stamp but non drive side is date stamped 1983 so drive side is from the early to mid 1960’s and the non drive side is from 1983 but both are Pista and 170mm lengths see the difference from stampings (photos 4 &6). Campagnolo Patent 46T Pista chainring, chainring fastening bolts…