1930 (July 9-10), Spitsbergen Flight pre-printed cover from Danzig to Hammerfest (Norway), franked by three Air Post values, green Flight cachet, arrival ds on reverse, VF, Sieger #73, €450, Est. $250-$300 (Image)

1932 (July 30 - August 1), Danzig (Luposta) Return Flight postcard to Switzerland, franked by complete surcharged air post set of five, green Flight marking, Friedrichshafen ''1.8.32'' arrival on the back, VF, Sieger #170B, €160 without a premium for franking, Est. $100-$150 (Image)