Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Austria - 1918 (August 1), Vienna-Lemberg (Lwiw) Pioneer Flight postcard, franked by 1.50k/2k lilac, 2.50k on 3k ocher and 4k gray, overprinted ''FLUGPOST'', complete set of three on white paper, ''2.VIII.18'' arrival ds, mostly VF, Est. $200-$250,Scott #C1a, C2d, C3a