Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - RSFSR and Soviet Union - Pioneer Flight - 1926 (June 2), registered cover from Moscow to Paris, franked by Lenin Mausoleum 7k-40k, complete perforated set of four, three-language boxed marking, backstamped in Paris on June 3, mostly VF, Est. $200-$250, Scott #298-301