Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Czechoslovakia - Pioneer Flight during the World War II - 1941 (April 5), cover from Czechoslovak Military Unit in Egypt to Chicago, franked by three Egyptian values, including two of Airplane over Giza Pyramids 20m and 30m, tied by FPO No.172, backstamped with FPO No.201 and machine Cairo ''10.APR.1941'' ds, Base censor band boxed seal, F/VF and rare item, a clipping from The Stamp Collector is included, Est. $300-$400