Thailand. (Imperial Airways - Greece). 1933. Illustrated Air Mail envelolpe headed 'Bangkok - Athens' addressed to 'Imperial Airways, Athens, Greece' bearing SG 255, 10s carmine and SG 274, 25s black and mauve tied by Bangkok GPO date stamp with 'jusqu'a mark in red over Pan Avion label.
Carried Bangkok to London by Imperial Airways, at London Office of Exchange the airmail label is crossed out by two parallel bars in red to indicate end of Air Transport.