3 ms·
Video of clock with narration by inventor: https://www.youtube.com/watch?v=cCqGtvTA36k https://www.youtube.com/watch?v=cCqGtvTA36k
by mhb 5y ago
Video of clock with narration by inventor: https://www.youtube.com/watch?v=cCqGtvTA36k https://www.youtube.com/watch?v=cCqGtvTA36k