Ala al Din Mahmud Shah I, Gold Tanka, 10.98g, Hadrat Shadiabad Mint, AH 870, Date above Sultanahu & engraved, Arabic legend on both sides, Obv: “al sultan al a’zam abu’l muzaffar ala al dunya”, Rev: “wa’l din Mahmud shah al khalji Khallada allah sultanahu” (G&G# M23). Very fine, extremely rare.