USA group of Airship Mail covers (5) on leaves with 1925...

USA group of Airship Mail covers (5) on leaves with 1925 (July 4) U.S.S Shenandoah Lakehurst to the Governors Conference, Bar Harbour, Maine, with 'By Airship Shenandoah' cachet, 1931 U.S.S Akron from Akron to Texas and another from Detroit to Oklahoma, each with the commem cachets, 1934 cover with 'U.S.S Macon Flying over Mare Island' cachet and another with 'Dirigible Macon ties up at Opa Locka Mooring Mast'.

Estimation:€118.35

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