My gut feeling is that these are a dime store novelty. The size (1 3/4" x 4 7/8") Small enough to be a package insert?? They're thin celluloid and bear the title Pak-O-Fun #'s 1, 4 and 6 respectively by W.N. Aubuchon Jr. copyright 1933. I've had these for years and I'm hoping that some of the incredible experts on the board could shed some light on their origin. Thanks!