Steel ball clock by Romanian craftsman Sunia Reznik.
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More:
https://www.craftsmanshipmuseum.com/Reznik.htm
Previously:
https://www.homemadetools.net/forum/...242#post176856
https://www.homemadetools.net/forum/...641#post163008
https://www.homemadetools.net/forum/...496#post158697
https://www.homemadetools.net/forum/...179#post157713
https://www.homemadetools.net/forum/...225#post153958
https://www.homemadetools.net/forum/...621#post143372
