Antikythera mechanism to predict astronomical positions and eclipses for astrological purposes; as well as the cycles of the ancient Olympic Games. Remains are in three main fragments; which are divided into 82 separate fragments after conservation works; contain gears; [10][11] The largest gear (clearly visible in Fragment A is approximately 140 millimetres (5.5蔵n) in diameter and originally had 223 teeth.The artifact was recovered in July 1901 from the Antikythera shipwreck off the Greek island of Antikythera. Believed to have been designed and constructed by Greek scientists; the instrument has been dated according to a more recent view; in 205 BC.IN THE PHOTO- ORIGINAL PARTS OF THE CLOCKWE SEE GREARS -WHEELS- TOOLED GEAR TEETH- National Archaeological Museum; Athens.