WWI German Parseval Sigsfeld Observation Balloon Drachenballon (Vintage Glass Plate Negative 1910s)

ultra rare original historical glass plate negative measuring approximately 12 x 9 cm. this is a unique one of a kind photographic master record from world war i, showing a german military parseval-sigsfeld type observation balloon floating in the air.
the balloon clearly displays the imperial german army balkenkreuz insignia on its envelope. the observer basket is visible hanging suspended underneath the structural rigging.
features hand-inked archival inventory numbers 926 at the bottom right corner and markings on the top edge from its original military documentation.

size: ~ 12 x 9 cm (1 cm ~ 0.39 inch)

condition: very good...some faults in plate....please also refer to scans which show complete glass plate

photography, fotografie, positive, glasdia, glas dia, glas negatif, photography, ww1 glass negative, world war i, 1914 1918, imperial german army, deutsche feldluftschiffer, parseval sigsfeld, drachenballon, fesselballon, military aviation, royal prussian air service, luftstreitkräfte, observation balloon, military archive