UMM-AL-QIWAIN A set of 12 lenticular stamps with cars, railways, birds.   

Please, note that lenticular stamps are often described as ‘hologram’ stamps, which is wrong. A lenticular stamp is covered with a rather thick plastic raster (a plastic ribbed surface) which gives the stamps a 3D depth effect. They can display 3D images as well as multiple images and images with animation.