Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1201:
Start price: $100
Buyer's premium:
1918, black overprint on 50k brown violet and green, postally used block of four, VF, ex-Dr. Zelonka, C.v. $220++, Bulat #2465
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Raritan Stamps, Inc