In the past few years, we have covered a whole host of rolling ball clocks here. The Arrow Electric Domino Clock is also worth a look. Introduced in 1983, this clock shows the time with 3 tiny balls that turn the dominoes. It ships in a snap-fit kit with motor, labels, cover, and everything you need to put it together.
You may also want to see:
Arrow Electric Domino Clock from 1983 - Gadgetify
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.
