Auction 90, Session 1 - Worldwide Rare Stamps and Postal History
Lot 481:
1860-63, Queen Victoria, imperforated proof of 12½c in black with red diagonal ”SPECIMEN” overprint, inscribed left sheet margin block of four on India paper mounted on card, top stamps with thin overprints (type B), bottom ones with thick overprints (type C), penciled positions 72- 73/82-83, no gum as issued, VF, Unitrade #13Pi, ii, C.v. CAD$200++, Sc. #13
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