Russia. (British Detachment In Siberia). 1920. Red Cross 'Correspondance des Prisonniers de Guerre' Reply card written from an Austrian Prisoner of War in Vladivostok addressed to Vienna cancelled by British 'Field Post Office/ 201' double ring '1st Mar 20' . Very rare item cancelled by the British Mission in Vladivostok, Siberia on P.O.W. Camp mail. Superb item sent three months later than the example recorded by Proud or Crabb.