ISLAMIC, Persia (Post-Mongol). Timurids. Timur (Tamerlane), AH 771-807 / AD 1370-1405. Tanka (Silver, 26 mm, 6.17 g, 9 h), post-reform type. Within a square, ‘lā ilāha illā Allāh / Muḥammad / rasūl Allāh’ (‘There is no deity but Allah. Muhammad is the messenger of Allah’ in Arabic); the names of the four Rashidun Caliphs around. Rev. Citing the Chaghatayid overlord Mahmud (AH 792-803 / AD 1390-1401) and the Timurid heir Muhammad Sultan (death: Shaʿbān AH 805 = March 1403), ‘sulṭān Maḥmūd Khān / amīr Tīmūr Kūrkān / fī zamān / walī al-ʿaḥd / Muḥammad Sulṭān’ (‘Sultan Mahmud Khan. Amir Timur Gurkan. In the time of the heir Muhammad Sultan’ in Arabic); marginal legend off flan. Album 2387. Rare and lightly toned. Struck slightly off center, otherwise, very fine.