The USPS provides a Scrambled Indicia Stamp Decoder tool that allows you to view hidden images and symbols on select commemorative stamps issued between 1997 and 2004. You will need the decoder to view hidden images on this Pathfinder Souvenir Sheet. The decoder lens is a precision optical device manufactured with the same acrylics used for prescription eyeglass lenses.
Will you be able to decipher the code in the $3 souvenir sheet? Stampcenter.com is offering the mint $3 Pathfinder Souvenir Sheet with the USPS Stamp Decoder. You may be surprised at what you find!