Originally Posted by
repechage
Italian threading differs from English as the inclusive angle of the thread is different, 55° vs 60° And I never remember which one is which.
The diameter is the same, 25.4 mm
A French "Cambio" bike would be unusual indeed, that frame appears quite nice, Italian frames of the period most often use a separate seat post collar clamp…
The Lugs and seat lug appear French to me.
Ok thank you for the info and i shall clean the threads and try again. I didn't want to force anything while trying the headsets.
Yes the lugs and especially the seat cluster looks French. There are many French bikes with this style of wrapping the seat stays at the top.