Persian Astrolab This early Persian astrolabe with a geared calendar movement is the oldest geared machine in existence in a complete state. It illustrates an important stage in the development of the.
Muhammad ibn Abi Bakr al Ibari century) Astrolabe with geared calendar, Oxford, Museum of the History of Science. Of Persian origin, and one of the oldest complete devices of it's like in the museums collection.
Imad al-Din Mahmud al-Kashi. The book of the birth of Iskandar. Horoscope of Prince Iskandar, grandson of Tamerlane, the Turkman Mongol conqueror. This horoscope shows the positions of the heavens at the moment of Iskandar's birth on April