RW57B Federal Duck Stamp. Black Bellied Whistling Ducks. Black Inscription is printed on The Stamp Paper Rather Than The Gum. Although This Stamp is Used It Has The Same Catalogue Value as The Unused. Upto 10 items at no extra cost. Thank you for looking. Please check back soon as. I will be adding new items daily. The item “RW57B Federal Duck Stamp Error. Used. Rare #02 RW57Bb” is in sale since Tuesday, August 23, 2011. 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.