AIR MAIL and ZEPPELIN Switzerland

Quality: ✉

9.9.1925 Zürich - Milano First Flight two covers one sent to Milano and the other one sent registered to Bern, the latter franked with the 75rp airmail stamp (SBK F11, cat. value CHF 150 on cover), both with "I. Flugpost Züruch-Mailand" single-line handstamp in violet, vf