1926 (November 26), Africa Flight registered cover from Zurich to Egypt, franked by four stamps, black boxed confirmation marking, Alexandria "3.Dec.26" arrival ds is alongside, undelivered and returned to Switzerland on December 21, appropriate hs on reverse, mostly VF and scarce, Est. $200-$250

200.00

1930 (December 2), Ad Astra Aero Africa Flight registered cover delivered on leg Zurich - Cartagena - Alicante, franked by three stamps, blue flight cachet, undelivered and returned to Fribourg on December 11,appropriate markings on front and reverse, F/VF, Est. $100-$120

100.00