[shiura]’s Hollow Clock 3 is a fantastic 3D printed take on a clock movement that uses a hidden mechanism to pull off its unusual operation. The Hollow Clock has no face, just an open space with ...

[Matthew] designed motor pin replacements specifically for Sunbeam electric movements, the relatively inexpensive alternative that graced many a mid-century household clock. He only had the ...

Movement could be mechanically driven or happen as a result of natural effects. Image caption, Astronomical Clock, Prague, Mikulas of Kadan and Jan Sindel, 1410, Peter Scholey / Alamy Stock Photo ...