Thailand. (Trans-Pacific Mail). 1940. Air Mail envelope addressed to California bearing SG 243, 50s black and orange-brown (4), SG 244, 1b green and lilac (2), SG 283, 10s carmine (2) and SG 289, 15s blue (4) tied by Bangkok GPO date stamp '17th July 40', endorsed 'via Air Mail'.
Colourful franking paying the 4 baht 80 satang Trans-Pacific Air Mail rate to the United States.