Originally Posted by vpiuva

French steerer for sure? If your steerer has a flat side rather than a key slot it's french and that headset will work
Just a point of order: I have come across steerers with the threading filed flat that were NOT French threaded. It's a rule-of-thumb, but there are exceptions. Also note that this French-threaded Campy HS has a tabbed washer, not one with a flat spot, so it's meant for a slotted French steerer. In my limited experience, later year French bikes began adopting the slot...and eventually they phased out the French threading too.