ages ago i bought some used high flange record hubs on ebay. Contrary to other Campy hubs i have, the freewheel size is not marked with anything obvious. After taking them apart i saw the date code on the cones was '72. They've been sitting for a while waiting for a suitable project. Now they are laced and ready to go, but one question remains. Which thread? I'd think the answer would be obvious, but in going through my stash of freewheels, i notice that all kinds seem to fit. I tried a french thread Maillard 5 speed and it rolls on fine. A Regina Gran Sport (not sure which thread is on this one, but Velobase says they were only available in English and Italian) also fits. I could keep trying others, but i wanted to ask around if there is a pretty easy way to detemrine the thread. I don't have digital calipers.
I had the idea to try some bottom bracket lockrings. ITAL was too big and just slid on, but BSA and FRENCH threaded on fine. Any tips?
oh and before i forget, i check the forum already and found this post which seems to confuse me even more, seeing it says French shouldn't be interchanged with anything.
Thanks in advance,