Struck in the name of Delhi Sultan Ghiyath al din Balban, Silver Tanka, 10.78g, Lakhnauti Mint, Obv: legend “al-Sultan al azam Ghiyath al Dunya wa al Din Abu al Muzaffar Balban al Sultan” in rectangle, Rev: Legend “al Imam al Musta'asim Amir al Mumineen”, date and mint in margin (G&G# B78). Extremely fine for type, rare.