Used this clock kit: Amazon.com: TIKROUND 12888 Quartz DIY Wall Clock Movement Mechanism Battery Operated DIY Repair Parts Replacement with 4 Sets Hands Total Shaft Length 23/32 inch .… : Tools & Home Improvement

Any clock kit may word if less than 18mm thick. Just adjust the size of negative parts.

Back contains a cavity for a nail/hook to hang on the wall.

Hands were made for kit above and fit, but you may slice and glue them onto hands from any other kit if needed. Fusion files (.f3d) included.

I suggest printing the hands with a .2 nozzle to capture detail of the smaller dragon.