Lot 20732 – 1919 Two covers from and to the Airfield of aspern with “Missione di Vienna-Collegamento Aereo Padova-Vienna-Praga”

1919 (Sept) Two covers from and to the Airfield of Aspern (“ital. Flugfeld of Aspern”), both addressed to the same lieutenant, each with two “Missione di Vienna-Collegamento Aereo Padova-Vienna-Praga” vignettes used to seal the envelopes (in one overlapping the edges), one sent unfranked by courier, the other with Austria 1kr tied by Angern ds; in addition an unused example of the vignette. Very scarce. Both signed Enzo Diena.