Oh, at least its getting easier to understand which are Not right...In reversible keys, the FT32/34 are easily distinguishable from FT33/35 in that the profile is reverse (Ft35 is groove on left). So the Fiat 850/Miura keys/locks) are FT32/34. Finding which use Ft33/35 seems harder, strangely I see Fiat 1100 locks that have it either way (!), and all the engine cover locks I see are groove on right (Ft32/34).
SAFE key markings also designate the series, so anything marked 2xxx is an FT35 (as Nate pointed out a long time ago). Somewhere, someone has a reference that relates the pin sequence...
https://pantera.infopop.cc/top...962#1598208440521962