Sold out from the postal service, 3200 copies. Discover the new generation of crypto stamps. For the first time, an SQR code is intergrated on the stamp that can be scanned with a smartphone. The app for stamp 4.0 enables users to verify the stamp and check that they are genuine. Each stamp is uniquely assigned to its owner and can be deposited in a personal wallet. You can also scan the stamp to receive digital character to solve puzzles with. Once all puzzles are solved, you can deposit an NFT of your character