Pendulum rolling ball clock (EN). Homemade 100% mechanical marble machine clock.

A homemade mechanical rolling ball clock (english, deutsche Version: ) The clock runs for 12 hours, driven by a weight of 2.5 kg sinking approx. 1 meter during that minute a marble is lifted up and goes down a marble run with three flipping traps that count marbles for minutes, five-minute-steps and hours. The timekeeping element is a second-pendulum with a pinwheel escapement. The clock achieves a drift of less than 1 second per day. I have to admit that this is bas