776 to 780, CSS 1181-1185, Dec 16, 1947, 50th Anniversary of Postal Service Commemoratives, $100, $200, $300, $400, $500 in part sheets of 20 (5 images)

776 to 780, CSS 1181-1185, Dec 16, 1947, 50th Anniversary of Postal Service Commemoratives, $100, $200, $300, $400, $500 in part sheets of 20 (5 images)