Pof.53II, Air FLUGPOST 2.50K/3K yellow / black, overprint type I.; lightly hinged, production warping paper, exp. by Leseticky., Kosack and Vrba, mark Stach
Pof.54II, Air FLUGPOST 4 Koruna grey / black, overprint type I.; mint never hinged, minor gum fault, lower slightly propitá expert mark Lešetický, Vrba certificate, exp. by Leseticky and Vrba, sought stamp!