One mint sheet of fifty 1962, 4 cent Project Mercury stamps issued by the United States Post Office. Mint condition, never hinged, with original glue. Fifty stamps to the sheet.  These can still be used for postage for both domestic and international shipping. Within the standard Scott stamp catalog this is SC #1193 in the US section. The item will be shipped flat. I have other US postage sheets of stamps posted in my shop.