Historically called the woodcutter's or farmer's clock, it can be used to find out the local time. The image shows a cardboard model cut and engraved on the laser cutter, my goal is to make it in brass using a Roland engraver.

Drawn in Corel Draw then laser etched and cut on an Epilog 45W.
The diameter is 168 mm but can be reduced although you would have to tweak various parts. Im still thinking on how to make the swivel joints. Brass pins and rivets could be used, although I might just try making it in acrylic first.