Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1196:
1937, 20th Anniversary of the Bolshevik Revolution in Russia, pre-printed souvenir envelope produced by International Historical Cover Committee (probably located in the US), bearing three commemorative stamps (5k Subway seems to be pre-cancelled) tied by Moscow ”7.11.37” ds, VF and very unusual item, Est. $150-$200, Sc. #551, 569, C50
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