Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Poland - 1930 (June 6), LOT and Imperial Airways First Flight Warsaw - Vienna - India, cover addressed to Cairo, franked by two air post values, violet flight cachet, Alexandria ''10.JU.30'' transit and Cairo ''11.JU.30'' arrival markings, mostly VF and scarce, Scott #C5, C8