It appears a random paper disc, 3-hole punch size, became fixed on the roller for a few stamps until the plate was cleaned. Estimate about 10 stamps affected, this is the only printing anomaly known on this issue, which had a very low printing quantity of only 10,000 sheets. Federal Duck Stamp (RW74b Variety)" is in sale since Friday, August 14, 2020.
This item is in the category "Stamps\United States\Back of Book\Duck Stamps".com" and is located in Houston, Texas.
This item can be shipped worldwide.