Rare semi-official forerunner card from the flight of the Postluftschiff Schwaben that pictures Grossherzogin of Hessen / Duchess of Hessia, Sieger XBA Nr2. Slightly worn at the edges, excellent condition, as per scans. Franked with the 'goose' Michel I semi-official airmail, with Flugpost am Rhein u. am Main DARMSTADT cancel.
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