Germany, Airmail, 1931, 1m-4m Polar Flight Zeppelins Complete. Each on separate flight cards and cover; 1m on 8pf postal card tied by "Leningrad 25,VII.31" and on-board cds's, 2m on 8pf postal card & 4m on cover tied "Friedrichshafen, 24.7.31" cds and Malyguin postmark, all with red German flight cachet, Very Fine. Michel No. 456-458. Scott No. C40-C42  Estimate $300 - 400. $0 (Image)