Bengal Sultanate, Ghiyth ud-din Azam Shah (AH 792-813/1389-1410 AD), Arsah Satgaon Mint, AH 811, Silver Tanka, Obv: Arabic legend "Ghiyath ud dunya wa'l din abu'l muzaffar A'zamshah al-sultan" in quarterfoil, ruler's tile in margin, Rev: Arabic legend "Nasir amir al-mu'minin ghawth al-islam wa'l muslimin khuld mulkahu" within a circle, mint Hijri year at the margin. (wt : 10.7g, 30.00mm, 15h) (GG # B247), superb luster, centrally struck on both sides, graded slabbed by NGC as MS 63, Rare in this grade.