This is a block of four 8-cent Nicolaus Copernicus postage stamps issued by the United States in 1973.The stamps are designated as Scott #1488 and commemorate the 500th anniversary of the astronomer's birth.They are categorized as "Mint Never Hinged" (MNH), meaning they are in original unused condition.
Estimate: $30 - $40
Auction : Stamps, Covers & Philatelic Collectibles: A Worldwide Sale — Cool Stuff Auctions