Zeppelin PC flown on the Graf Zeppelin LZ127 airship's 1929 Schweizfahrt / Swiss Flight, with Bordpost / Luftschiff on-board CDS. Dropped at Luzern / Lucerne with CDS from that town. Slightly worn, genuinely used top condition, as per scans. '17 CV EUR450++. Only 200 dropped of all types, and mixed German-Swiss frankings are uncatalogued. Scarce!