Technical What is this pulley?

Got this pulley in a box of parts and can’t figure out what it is, what the application and fitment is.

 

Looks like the pulley that was used with an aftermarket air conditioner, in the 60s/70s.

And from the telltale paint missing on the mating surface, I'd guess 1960s Ford V8. If it were a factory Ford pulley, it would have an engineering number cast into it. This is a damper for a 289

 

Yes it is an aftermarket A.C. lower pulley, I have one of those for a S.B. Chev if anyone needs it.

 

Hey that is great. Thank you guys for solving that mystery.