Tick Tock Clock: Working LEGO Clocks - BrickNerd - All things LEGO and the LEGO fan community
LEGO MOC Mechanical clock by Building with bricks | Rebrickable - Build with LEGO
LEGO MOC Spike Prime analog clock with three mechanically linked hands (hours, minutes, seconds) - ONE motor by mareklew | Rebrickable - Build with LEGO