Austria - Poland. (Prisoner of War Mail). 1918. Envelope addressed to 'Comite International de la Croix Rouge, Geneve' bearing Austo-Hungarian 'Feldpost' Yvert 30, 15h red tied by 'K.U.K. Etapptenpost/ Kozienice date stamp and framed 'Zensurient/ K.U.K. Zensurstelle/ Feldkirch/ 220' with hand-stamp 'Comite International de la Croix Rouge/ Geneve/ Agence Internationale des Prisonniers de Guerre/ Service des Enveloppes de Timbres du Guerre' with 'Comite International de la Croix Rouge/ Geneve/ Agences Des Prisonniers de Guerre' with framed 'Vendu Par/ L' Agence Internationale/ Der Prisonniers de Guerre' on reverse with Geneve arrival.