Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia And Soviet Union - First and Pioneer Flights - 1924 (October 30), pre-printed First Flight cover Moscow-Tehran, franked by two air post surcharged stamps, red boxed confirmation 3-line cachet and boxed ''Mit Luftpost'' marking, Tehran arrival ''14.XII.24'' handstamp is alongside, VF, Est. $150-$200, Scott #C8-9