This US Truk Caroline Islands Precancel Stamps Scott #1576 Block of 4 is a great addition to any stamp collection. The stamps were issued between 1971-1980 in the United States and feature historical events. The mint never hinged/MNH quality ensures that the stamps are in great shape and have not been certified. This ungraded block of 4 stamps is perfect for collectors who want to add to their collection without breaking the bank.