Thailand. (Bamboo Chop). 1937. Registered Air Mail crested envelope from the British Legation addressed to Devon bearing Thailand SG 254, 5s violet and SG 255, 10s carmine tied by bamboo obliterator on reverse with SG 260, 1b black and blue tied by Sonkhla date stamp '21st June', endorsed 'By Air Mail/ via K.L.M.' with 'Par Avion' label, routed via Bangkok with Budleigh Salterton arrival on reverse '29th June 37.'