Explorateur de timbres ↺ Scott or Y & T ? Airmail 1933-1944 Recess printed by the American Bank Note Company, New York. Line perf. 12. 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 (November 25, 1944) Sc C24 / YT PA32 Sc C24a / YT PA32