🕰 Clocks go forward in the UK tonight 🕰 This 19th-century rolling-ball clock is one of the most elaborate examples in the collection✨ When the ball reaches the end of each run, it hits a release lever causing the tray to tilt, and the ball rolls back along the track, meaning the process repeats every 30 seconds. http://ow.ly/lwv130pLDPI Crazy about clocks? Hungry for more horology? Find more terrific timepieces in our Collection online: http://ow.ly/4sJb30qrYGF | British Museum