BRITISH INDIA: Victoria, Empress, 1876-1901, AR ¼ rupee, 1880-C, KM-490, extremely rare date, NGC graded MS64, RRR. An example in NGC MS-63 was sold in Heritage Auction 3032 (April 2014) for $17,037.50 (including buyer's premium).
Estimate: 2,300-2,500 GBP