Vintage Hologram Sticker: as a point source of light held above is moved from side to side, one can see what’s behind the balloon and elephant passenger in this vintage hologram sticker from the late 1970s. This sticker is an early example of a Benton or rainbow hologram like those now found on credit cards, and the 3D effect comes only from changing side to side viewing perspective, vertical perspective changes only change color. Unlike photographs, holograms are recordings interference pattern