Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 783:
1913, Alexander III, stage proof (unclear border of the oval) of central vignette for stamp of 3k in rose red (issued color), size 32x57mm, printed on thick chalk-surfaced paper without gum, hinged, no thins or other hidden defects, VF and scarce, Est. $400-$500, Scott #90
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