Originally Posted by
Road Fan
Thanks for giving, gents! However, this is starting to look as muddy as it was before I asked.
My crank has the non-engraved logo fairly close to teh BB, not out near the chainrings as on the second C-record shown in Velobase. I looked at the early C-record catalog, but I haven't yet tried to trace the pattern through. I also FWIW have a script Ugo de Rosa pantographed on teh drive side arm.
Road Fan
If they were bought by you as a pair it means the left one has been replaced after cracking across/because of the pantographing. Old Record seemed to stand up pretty well to being carved on (except for the usual cracks starting where arm meets spider) but C-record, in my observation, seemed very prone to cracks originating in the pantograph.
Look for cracks in your right crankarm before you use it!
Later
Mel