Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1473:
1918, black overprint (type 10) on perforated 2k-3.50r, set of 11 values, full OG, LH or hinged, F/VF, C.v. $221, Est. $100-$150 , Bulat #1518/31
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