90c Blue, Large Die Proof on India, "Specimen" Ovpt. (72P1 var). Mounted on 152 x 229mm card with black "SPECIMEN" overprint across stamp and full imprint in brown at bottom, from a National Bank Note Co. sample book, some slight edge wear which could be easily trimmed since this is such a large-size example, Very Fine and scarce, the only other example contained in Power Search is cut considerably smaller than the proof offered here, Scott Retail as normal die proof $500.00

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