ISLAMIC, Persia (Post-Mongol). Safavids. Tahmasp I, AH 930-984 / AD 1524-1576. 1/4 mithqal (Gold, 13 mm, 1.16 g, 3 h), fourth gold standard, Imam Rida (= Mashhad), AH 968 = 1560/1. Shiʿa kalima, ‘lā ilāha illā Allāh Muḥammad rasūl Allāh ʿAlī walī Allāh’ (‘There is no deity but Allah. Muhammad is the messenger of Allah. Ali is the friend of Allah’ in Arabic); the names of the twelve shiʿa imams in the surrounding segments, almost totally effaced. Rev. Within an ornate cartouche, ‘Imām Riḍā, 968’ (‘Imam Rida, 968’ in Arabic); around, traces of the titles of the king, mostly effaced. Album O2593. Some areas of weakness and with an edge crack, otherwise, good very fine.