Hello curious about these ww2 and post war pins :)

[Dr. DTMUNG]

Hello I picked these up at a thrift store earlier today and I was curious about what some are and what their time periods are

[Gwar]

The ones on the right look like U.S. Air Force, odd that the center star is missing, all of these have, for the most part, the same fastening type device which is more modern than old..

[Dr. DTMUNG]

Interesting