Thailand. (Netherlands Post Office in Bangkok). Circa 1945. Stamp-less envelope written by 'Kapt. Theelen, ex P.O.W. of the Netherlands Postkantoor, Bangkok' addressed to 'Rene Theelen, P.O.W. 39037, Kamp No 4, Tjimahi, Java'
Capt Theelen had been a Dutch P.O.W. in the Netherlands Indies, while awaiting repatriation he organized the Netherlands Post Office in Bangkok requesting a Swiss style date stamp for use by the Netherlands Mission. The cancel was received by Theelen on the '26th March 1946' and the Office closed on the 26th November 1946.