Auction: 142 - March Philatelic Collector's Series Sale
Lot: 778
Unitrade #13TCvi-viii, 1860 12½c Green, trial color plate proof on India mounted on card, left sheet-margin imprint block of six, showing three different types of red diagonal "Specimen" overprints, Ty. B, C and D, fresh and extremely fine; a scarce multiple.
Sold for
$375
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