1926 - 1927, airport cancel, box cancel of 2 lines "Halle (Saale) / airfield" on cover with 10 Pfg eagle, horizontal pair, to Brunswick; box cancel of 2 lines "airport / Hanover" on cover with 5 Pfg eagle, horizontal strip of four, to Mülheim and KBS "Munich airfield" on card with 5 and 10 Pfg eagle to Tilsit, good condition, interesting lot