Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1172:
1918, bluish green (type 1) and black (type 2) overprints on perforate horizontal pair of 70k brown lilac and orange, full OG, NH, VF and scarce positional item, expertized by Dr. Seichter, ex-Dr. Zelonka, C.v. $425 as singles, Bulat #1024-1044
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