(Stepping oh-so-timidly into the expert field of those with intact braincells)
The backside of freewheels could be marked: no marking: italian one ring: english threads two rings: french
FI: Filettare (to thread or filet).
I know that "I" could also mean Inglese, but I recall that they had another code, possibly F.A. The more I exercise my brain, tho, maybe it was Inglese, with no marking remaining Italian.
Capito?
Ricardo Bulissimo, Verdi Nevada