U.S. Airmail Special Delivery Stamps U.S. Airmail Special Delivery Stamps U.S. Back of the Book Issues U.S. Commemorative Stamps U.S. Stamp Issues by Catalog Number U.S. Stamp Packets Other U.S. Stamps U.S. Air Mail Special Delivery Stamp CE2 Used US Airmail Special Delivery Stamps – 1936 16¢ – red & blue