AIR MAIL and ZEPPELIN Austria

Quality: ✉

19.9.1937 Military Aviation Day - Wien-Klagenfurt Special Postal Flight - Leoben drop-off illustrated 30g postcard (numbered, this being no. 60) addressed to Vienna and up-rated with 1S and 10g airmail stamps, all tied by special decorative postmark, with additional flight cachets alongside, as well as regular arrival c.d.s., vf