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

Russian Locals of the Civil War period - South Russia

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Start price: $150

Buyer's premium:

YEKATERINODAR ISSU:e1918-20, double black surcharge ”-50” on 2k green, three-side margin imperforated block of 20 (5×4), full OG, NH or hinged (two top stamps), VF, C.v. $800 as hinged singles, Est. $250-$300 , Sc. #36b