Mahmud bin Muhammad bin Firuz, Gold Tanka, 11.23g, Obv: Arabic legend “al-Sultan al-‘Azam Abu al-Muhamid Mahmud Shah bin Muhammad Shah bin Firuz Shah (Sultani)”, Rev: Arabic legend “Fi Zaman al-Imam Amir al-Mumineen Khulidat Khilafatahu” (G&G# D622). Very fine, very rare.