Auction 90, Session 1 - Worldwide Rare Stamps and Postal History
Lot 333:
1857, Prince Albert, imperforated proof of 6c in black, horizontal pair on India paper mounted on card, vertical orange ”SPECIMEN.” overprint, balanced margins, fresh and VF, Unitrade #2TCx, CAD$750 as singles, Est. $275-$350, Sc. #2
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