Watch List notes:

SULTANS OF DELHI, Rukn al-din Firuz (A.H. 633-634; A.D. 1235), silver tanka, Dehli, AH 633 (1235 A.D.), (10.83 g), (G&G D90 This Coin illustrated). Very fine, slightly off centred on the reverse, very rare.

Ex Dr V.J.A. Flynn Collection and Baldwin's Auction Sale 53, 25 September 2007, (lot 1558).