Silver tanka of Shams ud-Din Yusuf Shah (879-885 AH = 1474-1481 AD), Bengal. Large silver coin, measuring 27mm, 10.8 grams. Inscriptions on both sides. Dar al-Darb mint, dated to 883 AH = 1478 AD. Superb condition, scarce! "The coins of Indian Sultanates" #B561.