80 K North pole flight in perfect condition mint never hinged with overprint type I, signed on the base Krischke BPP, Michel 300,-- (8I) (Image 1) (Image)

80 K North pole flight with overprint type III in perfect condition mint never hinged from lower margin, signed on the base Krischke BPP, Michel 260,-- (8III) (Image 1) (Image)

1 R special stamp \"red army\" with overprint type II in perfect condition mint never hinged, signed on the base Krischke BPP, Michel 250,-- (10II) (Image 1) (Image)