William J Kozersky, Philatelist |
U.S. Christmas Seal Die Proofs: U.S. Christmas Seal Die Proofs are printed from a small plate with a single copy of the design made from the original negative. They are often displayed in the center of a much larger piece of paper. Die Proofs are identified with catalog numbers from the Green's Catalog. We have identified and cataloged the following Christmas Seal die proofs: |