Russia, Airmail, 1931, 1r Polar Flight Zeppelin, Imperf, in combination with Airmail, 1931, 30k Polar Flight Zeppelin, imperf on registered flight card addressed to the Malygin, tied by "Leningrad 25.VII.31" zeppelin cds, registry etiquette and red flight cachet, Malygin receiving postmark, Very Fine and choice. Scott No. C28+C26  Estimate $75 - 100. $0 (Image)