AIR MAIL and ZEPPELIN Switzerland

Quality: ✉

13.4.1924 Flugtag Grenchen two covers both franked with the vignette issued for the occasion (SBK 7I, cat. value CHF 60 on cover) alongside a 35rp airmail stamp (SBK F6, cat. value CHF 120 on cover), tied by special flight postmark in blue, Zürich arrival c.d.s. on the back, minor flaws but overall fine aspect, vf