Thailand. (Netherlands Post Office in Bangkok).1946. Stamp-less envelope endorsed 'On Active Service' written by Capt Theelan to his wife in Maastricht cancelled by 'Ned. Postkantoor / Bangkok dated '15th July 46' on face. Capt Theelen had been a Dutch P.O.W. on the Thai-Burma railway while awaiting repatriation he organized the Netherlands Mission. The cancel was received by Theelan on the 26th March 1946.Very fine.