AIR MAIL and ZEPPELIN Switzerland

Quality: ✉

25.2.1935 "Erste Winterluftpost in den Bündneralpen Februar 1935" cover flown on the Zürich - St. Moritz leg (addressed to Bern), bearing a beautiful franking consisting of a pair of the 10 on 15rp italic surcharge (SBK F19) and a block of four of the regular surcharge (SBK F20), vf