Watch List notes:

Bengal Sultanate, Rukn ud-din Kaikaus (AH 689-700/1290-1300 AD), Silver Tanka, Lakhnauti Mint (Off flan), Obv: Arabic legend "al-sultan al-azam Rukn ud-dunya wa'l din abu'l muzaffar Kaikaus sultan bin sultan bin sultan", Rev: Arabic legend "al imam al-musta'asim amir al-mominin" within a double square inside a circle, mint Lakhnauti & Hijri year in the margin, 11.2g, 28.25mm, (G&G # B89), about very fine, Very Scarce.