Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1529:
1918, black overprints on imperforated 1k, 3k and 5k, complete set of three, nice margins around, full OG, LH or hinged, VF and rare, each one expertized by Dr. Seichter and others, Bulat #2324-26, each one priced with ”-”, Est. $500-$600
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