Bidspirit auction | Imperial Russia - Romanov Dynasty

Imperial Russia - Romanov Dynasty issue - 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. $300-$400, Scott #90