Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 320:
1919, postal stationery card with black surcharge ”BATUM. OB. KOP.35 KOP.” on 4k red, minor soiling, otherwise unused, VF and very rare, according to Ashford only 46 such cards were produced (most Batum stationery cards were surcharged on Imperial cards of 3k), Est. $400-$500
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