Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Russian Air Post Stamps

The auction will start in __ days and __ hours

Start price: $300

Buyer's premium:

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, full OG, NH, F/VF centering, C.v. $900, Est. $500-$600 , Sc. #C23a