Siam, 1924, Dec 9
First regular flight, Ubol to Bangkok, bs 12/12, violet straight line 'Via Air Mail' hand stamp.
Siam, 1933, Dec 31
F/F Bangkok to Athens, carried on Imperial Airways/ITCA return flight of the Rangoon-Singapore extension, official blue/red 'London-Singapore/Rangoon' souvenir cover franked 10st, 25st, canc Bangkok dr. cds, typed "Bangkok-Athens". The details of this particular flight are both interesting and complex. On the return flight mail from Singapore and Penang arrived in Athens on 7th January 1934, having been placed on board at Alor Star. However mail for Greece from Siam was overflown to London, arriving Jan 10th, from where most, to Athens, was returned by rail, and a small amount by air. The mail returned by air arrived later than that returned by rail. This particular cover illustrates this story well. A red double bar Jusqu'a cancelling the airmail etiquette confirms arrival in London. The Athens back stamp is January 15th, the same as the arrival date, in Athens, of the Croydon-Singapore flight IE251, which left London on Jan 13th. So it would seem this particular cover was one of the few flown all the way by air from Bangkok-London-Athens.
Siam, 1935, Aug 18
Bangkok to England, no arrival ds, imprint airmail etiquette cover franked 35 stc, ms '3g'.