AIR MAIL and ZEPPELIN Liechtenstein

Quality: ✉

14.6.1930 airmail cover sent registered from Triesenberg to Assen, Netherlands and showing a mixed franking with Swiss stamps, which was compulsory on airmail covers from Liechtenstein until 12.8.1930 because Liechtenstein didn't have any airmail stamps of its own, the Swiss stamp was applied in Basel in this case, Dutch arrival c.d.s. on the back, great quality, vf