Prints in one part in about 7h large (5.5h small) with 0.6 nozzle, 0.35 layer height and 15% infill.
Customize in Prusa Slic3r by choosing different filament colors for layers (see picture)
Two sizes are available. One for Prusa MKX and smaller one for Prusa Mini printers.
Std clock module mechanism can be bought from https://amzn.to/32ZKbjR or AliExpress or your local clock store.
The author hasn't provided the model origin yet.