Bengal Sultanat, Ala ud-din Ali Shah (AH 740-746 / 1339-1345 AD), Al Balad Firuzabad Mint, Silver Tanka, AH 74X, Obv: Arabic legend "al-sultan al-azam ala ud dunya wa'l din abu'l muzaffar Ali Shah al Sultan", Rev: Arabic legend "sikandar-uz-zaman al-makhsus ba enayat-ur-rahman nasir amir-ul-mominin", mint name & the hijri year in the margin, 10.80g, 26.0mm, (G&G # B141), about very fine, Scarce.