Yeah, It's pretty normal.
You were correct. Those are the wire wheel correct caps and spinners for 64 1/2. The caps are reproed, but the spinners are not. The spinners are tough to find in good shape, but they are out there if you look for them. There was also another Wire wheel spinner cap which used the very same caps, but there were more "fake" wires and they were closer together. Those caps are known as the Falcon/Failane wire wheel Spinner caps more predominantly , but were also used on galaxies as well. I know I have a pic of them.. I sold a set of the a few years ago.
Your caps I would consider them "more correct" for a '64 1/2 mustang. The regular '65/'66 wire wheel caps (Also used on Sprint 200 cars) carry the same cap but with a revised smaller, shorter, flatter three prong spinner with a blue center. You could probably write a small book on the variations of the 1960's Ford wire wheel hubcap. There were about six or seven different variations of them from '64-'70...and if you bring in Mercury cars, They are different as well (Usually with different centers), but similar caps.. I could go on and on..
Tony K.