Thailand. (Air Mail). 1924. Air Mail envelope hand-stamped 'By Air Mail' in violet addressed to Bangkok bearing SG 213, 3s red-brown (pair) tied by small ;aeroplane' date stamp of ROI ETCH dated '8th Nov 1924' with Bangkok arrival on reverse '12.12.24' (date error).
Carried on the weekly flight of the Royal Aeronautical Service from Roi Etch to Bangkok.