The product is a brand new set of USPS Sailboat Postcard 2022 Forever Postage Stamps, consisting of 5 sheets of 20 stamps each. Each stamp has a denomination of 61 cents and features a colorful multi-color design. These stamps are self-stick and have a forever certification, meaning they never expire! Peel and stick. 100 total stamps. How to tell if your stamps are legitimate? Stamps with a P1111 code are completely legitimate, while stamps with an X1111 code are likely counterfeit if they are on a physical stamp you purchased. www.apnss.... +1 Here is exactly why they differ: • P1111 is Authentic: The letter "P" stands for Ashton-Potter USA Ltd, an officially licensed security printing contractor for the United States Postal Service. For popular postcard stamps —like the 2023 Sailboats postcard stamp—P1111 is the official, real plate number printed by the USPS.