The cover sheet is signed. This lot of 25 prints features stamps that he designed for the different countries.Included is one of the mint duck stamp the designed. The item "DAVID MAASS SIGNED DUCKS OF THE WORLD STAMP AND ART PRINT COLLECTION-25 PRINTS" is in sale since Sunday, June 28, 2020. This item is in the category "Art\Art Prints". The seller is "eacjwj" and is located in Bristol, Connecticut. This item can be shipped to United States.