Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - 1944, the Stratosphere Disaster, the second issue, four covers bearing 1r stamps of the issue, sent from Stalino (now Donetsk) to Moscow, from Moscow to Krasnodar and two by registered mail from different Field PO to Moscow, minor flaws, still F/VF, Est. $250-$300, Sc. #C77-79