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

Russian Offices in the Turkish Empire

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Start price: $1,800

Buyer's premium:

1913, Romanov Dynasty, black surcharge 50pi on 5r dark brown, three-side margin block of 25 (left part of a sheet), post office fresh, full OG, NH (LH on margins only), VF and rare multiple, C.v. $5,625 as singles, Est. $3,000-$3,600 , Sc. #227