Plate Numbered Block Of 6. Please check back soon as I will be adding new items daily. The item "RW25 Federal Duck Stamp. #02 RW25PB6BL" is in sale since Wednesday, January 03, 2018. This item is in the category "Stamps\United States\Back of Book\Duck Stamps".The seller is "rebenic25" and is located in Cape Coral, Florida. This item can be shipped worldwide.