1931 Polar Flight cover addressed to Hermann Sieger, franked with 1M horizontal pair, canceled on board, with appropriate cachet and Friedrichshafen arrival pmk on back, v.f. (Cat No. C40)
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1931 Polar Flight cover, franked with 4m and addressed to Germany, v.f. (Cat No. C42)
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1931 Polar Flight, 2c U.S. Stationery card, additionally franked with 4m and addressed to Bedford, Virginia, with special Tourist cachet on reverse, v.f. (Cat No. C42)
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1931 Polar Flight cover addressed to Zurich, franked with 4M canceled on board, with Icebreaker Malyguin 27.7.31 postmark alongside, v.f. (Cat No. C42)
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1933 Chicago Flight, cacheted (printed) cover to Dallas, franked with 4M tied by Friedrichshafen cds, triangular handstamp and green arrival pmk on back, fine-v.f. (Cat No. C45)
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193o South America Flight, cover franked with 2m and 4m (2), used on flown cover from Friedrichshafen to Harrisburg, PA, with Lakehurst arrival, fine-v.f. (Cat No. C38-39)
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