Belgian Congo. (Katanga - Prisoner of War Mail). 1917. Envelope written from Katanga addressed to 'Comite International de la Croix Rouge/ Service des Prisonniers de Guerre, Geneve' bearing Yvert 67, 25c blue and black (pair) tied by Katanga date stamp with hand-stamp 'VERIFE' and framed 'Vendu Par/ L' Agence International/ Der Prisonniers de Guerre' in lilac and hand-stamped 'Comite Internationale de la Croix Rouge/ Geneve/ Agence Internationale Des Prisonniers de Guerre/ Service des Enveloppes et Timbres de Guerre' on face, routed via Great Britain with 'Opened by Censor/4516' label and with Geneve arrival '5th July 17' on reverse. Very rare item from a P.O.W. in Katanga.