5c 6th International Philatelic Exhibition Stamped Cover plate proof. Certified plate proofs are the last printed proof of the plate before printing the stamps at the Bureau of Engraving and Printing. These plate proofs are each unique, with the approval signatures and date.


Size: 1453px × 1719px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

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