Carnet, luxurious ministerial issue, "in memory of Capt. F. Żwirka and Eng. St. Wigura" 1933, cover with dry-embossed state emblem, signature of Undersecretary of State Fr. Drzewiecki, additionally imprinted office date stamp Warsaw 1, with discriminator "4j"; very rare value in perfect state of preservation, signed G.WATTSON WARSZAWA. All philatelic values can be viewed at our office in Wars...