USA 1909 3c "George Washington" Deep violet (Experimental printing on bluish "rag" paper.) SG366. A very fine, well centred and fresh unused original gum example of this scarce experimental printing.
Approximately only 4,000 were printed by the Bureau of Engraving and Printing.
Accompanied with a photocopy of a 1964 Philatelic Foundation (PF) Certificate of Authenticity from which this single was taken.
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