Poland. (Prisoner of War Mail). 1919. Envelope addressed to 'Comite International de la Croix Rouge, Geneve' bearing Poland Yvert 151, 25f turquoise tied by Stanislau date stamp with framed 'Wokskowa Cenzura/ Lwow' and circular 'A4' cachet in violet with 'Comite Inernational de la Croix Rouge/ Geneve/ Agence Internationale des Prisonniers de Guerre/ Service des Enveloppes de Timbres de Guerre' and framed 'Vendue Par/ L' Agence Internationale/ Der Prisonniers de Guerre' on reverse. Very fine and scarce item.