This is Your Chance to Own a Hard-to-Find Stamp Decoder
Since 1997, the United States Postal Service has placed hidden images on select commemorative stamps... but you’ll never see them with a magnifier. That’s because the images are only viewable using a special “stamp decoder.” These decoders are not manufactured anymore and have become very difficult to find.
Discover the Hidden Pictures in Modern U.S. Stamps
This decoder is made from “nearly a thousand tiny elongated lenses called lenticules.” To view the hidden images you simply place the decoder over the stamp and like magic, they pop out of the design. The images serve two purposes: to entertain collectors and to act as a counterfeiting deterrent. You’ll find they’re great fun. And without the decoder, you’re really not fully appreciating your stamps, so send for yours right away.