Delhi Sultanate, Tughluq Dynasty, Firuz Shah Tughluq (AH 752-790/1351-1388 AD), Gold Tanka, AH 765, with the name of the Caliph Abi' Abd Allah al-Mutawakkil I, Obv: Arabic legend "al-sultan al-a'zam Saif amir al-mu'minin abu'l Muzaffar Firuz Shah Sultani khulidat mulkahu", Rev: Arabic legend "fi zaman al-imam amir al-mu'minin abi abd allah khulidat khilafatuhu"within a circle, mint name & date in the margin, 10.99g, 20.73mm, (Variant of G&G # D464, date is unlisted), choice quality, UNC, Very Rare.