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Auction: 148 - The Philatelic Collector's Series Sale
Lot: 189

#212P4, 1c Ultramarine, plate proof on card, a handsome example of one of the rarest card proofs from the 19th century, large balanced margins all around, intense color and exceptionally fresh, extremely fine; a major key to a proof collection; 2012 PF certificate.

Sold for
$1,250