Delhi Sultanat, Turk Dynasty, Ala-ud-din Mas’ud (AH 639-644/1242-1246 AD), Hadrat Dehli Mint , Rare Silver Tanka, Obv: al-sultan al-a’zam ‘ala’ ud-dunya wa’l din abu’l muzaffar mas’ud shah bin al-sultan, Rev: fi ahd al imam al mustasim amir al mominin,(G&G # D121)