Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 470:
Description
1857, Prince Albert, imperforated trial color proof of 6p in black, horizontal pair on India paper mounted on card, vertical orange ”Specimen” overprint, balanced margins, fresh and VF, Unitrade #2 TCx, CAD$750 as singles, Est. $250-$300, Sc. # 2
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