Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1146:
1913, Romanov Dynasty, Alexander III, two imperforated stage proofs of central vignette for stamp of 3k in rose red, first one with unfinished design (unclear oval), printed on thickened chalk-surfaced paper without gum, sizes 27x42mm and 26x32mm,the last one with marginal thin, both are hinged, VF and scarce couple, Est. $500-$600, Sc. # 90
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