Bulgaria. (Prisoner of War Mail). 1918. Registered envelope addressed to 'Comite International de la Croix Rouge, Geneve' bearing Bulgaria Yvert 113, 50s violet tied by Philipopple bilingual date stamp with boxed 'R' and hand-stamp 'Comite Internationale de la Croix Rouge/ Geneve/ Agence Internationale des Prisonniers de Guerre/ Service des Enveloppes de Timbres de Guerre' with framed 'Vendu Par/ L' Agence Internationale/ Der Prisonniers de Guerre' and 'Controle Postal Militaire' label tied by oval 'Control/ Par L' Autorite Militaire/ 1' in blue on reverse.
Lovely item.