good looking mount Chuckk!

interesting puzzle non-fixie. suspect fork not original.

are dropouts pretend forged? recall seeing some 531 plain gauge falcons with these. had one such come through about forty some year back.

have a falcon hanging in the rack but cannot measure headplate holes for you as am ~700 km distant from it at present.

no doubt, the forum's falcon experts will be along momentarily to enlighten us...

looking forward to reading their observations.