Thu Jul 31, 9:20 AM ET

LONDON (Reuters) - A mechanical brass calculator used by the ancient Greeks to predict solar and lunar eclipses was probably also used to set the dates for the first Olympic games, researchers said on Wednesday.

The Antikythera Mechanism was retrieved from a shipwreck off the Greek island of Antikythera in 1901, an example of the technological prowess of the ancient Greeks.

Researchers reporting in the journal Nature said they had now discovered that the device, made at the end of the 2nd century BC, used an intricate set of bronze gearwheels, dials and inscriptions to set the games' date.