It was constructed by Muhammad al-Sa'ati in the 12th century, and later described by his son Ridwan ibn al-Sa'ati, in his On the Construction of Clocks and their Use (1203), when repairing the clock.
Det byggdes av Muhammed al-Sa'ati på 11-hundratalet som senare beskrevs av sonen Ridwan Ibn al-Sa'ati skrift: On the Construction of Clocks and their Use från 1203 i samband med en reparation av uret.