Bengal Sultanate, Ghiyath ud-din Mahmud (AH 939-945/1532-1538 AD), Husainabad Mint (off flan), Silver 1/4 Tanka, AH (9)39, 'Badrshahi' Series, Obv: Arabic legend "al-sultan bin al-sultan Ghiyath ud dunya wa'l din Abu'l Muzaffar Mahmud Shah", Rev: Arabic legend "al-sultan bin Husain Shah al-sultan khuld allahu mulkahu wa sultanahu" with Hijri year, 2.68g, 14.00mm, (G&G # B906), choice extremely fine, Rare.