AIR MAIL and ZEPPELIN Liechtenstein

Quality: ✉

14.5.1939 N° 84 (Mi. Zeppelin Specialised), International Weather Balloon Flight Zürich - Bäretswill cover sent from Vaduz to Gempen, Switzerland, bearing 10rp + 50rp airmail stamps, special flight cachet and landing postmark both alongside on the front, vf