Unlisted silver tanka of Jalal-Ud-Din Mohamed Shah (818-836 AH = 1415-1432 AD), Bengal. Large silver tanka of Jalal-Ud-Din Mohamed Shah (818-836 AH = 1415-1432 AD), Bengal. Large silver coin, measuring 27mm, 10.8 grams. Inscriptions on both sides. Undated and mintless. The type with the obverse in quatrefoil is not published, it seems. "The coins of Indian Sultanates" #B308A variety.