Bidspirit auction | 1973 block of four 8-cent

1973 block of four 8-cent Nicolaus Copernicus postage stamps - 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.