Stamp Finder ↺ Scott or Y & T ? Airmail 1933-1944 Airmail Stamps 1933-1940 Sc C5 / YT PA5 Sc C6 ('35) / YT PA6 Sc C7 ('37) / YT PA9 Sc C8 ('38) / YT PA10 Sc C8A ('40) / YT PA21 Sc C9 / YT PA7 Surcharge 1944 (November 25, 1944) Sc C24 / YT PA32 Sc C24a / YT PA32