Czech Rep. | 10 Korun

Clockwork mechanism. The world’s first mechanical clocks are thought to have been tower clocks built in the region spanning northern Italy to southern Germany from around 1270 to 1300 during the renaissance period. These clocks did not yet have dials or hands, but told the time by striking bells. The clocks used the suspended weights to move their wheels. There were two such weights, one to move the clock and the other to ring the bell.