Hidden Images in United States Stamps

During the years 1997 to 2004 the United States Post Office produced nearly 1.75 billion postage stamps that contain a "hidden image". These covert designs are only visible when viewed through a special device called the "Stamp Decoder".


 



The STAMP DECODER is a special plastic lens manufactured especially for reading hidden images and symbols on selected stamp issues.
 










Using the Decoder (held at the correct angle), the images magically appear. Click the image above to see an animation courtesy of Graphic Security Systems Corporation.



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