Lea Stein Celluloid Pins
Except where noted, these are original "old stock" Lea Stein, made in France from the 1970s through 1981. (Yeah, I know they're post-1960s, but I love 'em.) They all have melted-in pinbacks (which is not a guarantee of old stock; Lea Stein pins are being produced today with this type of pinback). Most are marked "Lea Stein - Paris." These pieces are composed of cellulose acetate.