The largest rolling ball clock is AION which is 11.6 m (38 ft) high 6 m (19 ft 8 in) wide and 50 cm (1 ft 7 in) deep. It is located at the headquarters of Bucherer AG, Lucerne, Switzerland, and was measured on 11 March 2008.

A rolling ball clock is a clock which displays time by means of balls and rails. The total length of the rails for all balls in AION is 297.8 m