I have heard these called..tac-back scatter pins, pinch backs, snap-backs, clutch pins, clutchettes, fashion pins and clasp pins. These are whimsical clothing accessories, popular from the 1940's to the 1960's. Click on picture to enlarge.
I have several cards for sale in my ecrater store, look under the category STUFF tac-back pins.
@ Pegs Buttons
