Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2

Soviet Union

The auction will start in __ days and __ hours

Start price: $50

Buyer's premium:

1937, Architectural Congress, 40k violet, souvenir sheet of four values, 5 examples, full OG, NH, VF, C.v. $275, Est. $75-$100, Scott #603a