1870 (Oct 20) specially prepared folded letter from Paris, franked with 80c Laureated, tied by "Paris, R. Bonaparte Oct 20" cds, with corresponding postmark alongside, addressed to Tuszow (Dept. Lublin), with printed "par Ballon Monte", boxed "P.D." (paid to destination) v.f. balloon ("Le Garibaldi") used during the Siege of Paris to Poland, signed Roger Calves (Image)

Est.$5,000

1922 (Oct 5) first flight Warszawa-Lwow, cover franked with 50M, boxed "Poste Aerienne" and variety of other markings, cover crashed and was subsequently immersed in water, hence address illegible, fine (Fi.16d, Zl 2,000) (Image)

Est.$250

1929 (22 May) Poznan flight cover to Warszawa, with special Exhibition label, v.f. (Image)

Est.$150