Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1498:
1918, red overprint (type 1) on 10k dark blue, bottom margin pane of 25, some perf separations, full OG, NH, VF and scarce multiple, each stamp expertized by Dr. Seichter, Bulat #824b, C.v. $1,250++, Est. $500-$600
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