Here's another Campy Hub dating question. Does anyone know when Campy started stamping the thread specs on the freewheel flange on NR hubs? I know they didn't do it in 71, since I was assembling bikes then, but my guess is that it started some time soon after that. I am restoring a very nice late 71 build date Italian MASI GC and I would like to get it all right if possible. Thanks, Tom Hansen, Los Angeles, CA USA