Repeat after me — lenticular (len TIK yoo luhr).
I learn something about antiques and vintage things every day. Today, I’m working on an eBay listing for a 1964 Barry Goldwater campaign pin. It has a small pair of thick-rimmed eyeglasses (Goldwater’s trademark) with a dangling charm. The charm has a picture of Barry Goldwater and the text “Goldwater in ’64”. As you move the charm, the image changes between the face and the text. I see these all the time, particularly in children’s toys, but have never sold one and, therefore, never gave a thought to what they might actually be called. A changing picture pin? A moving image pin? Nope. This is a lenticular image pin. Who knew?
OK, they are also commonly called flasher pins, but I like lenticular better. So there.