It is a 3 colour print, using simple method, you don't need any fancy tools, just ad a colour change on Prusa slicer on 4.2mm and 5.2mm or change the filamwent on these hight if you using 0.2 layer hight.
On the picture it is a 300mm wide clock, when you using the smaller version use smaller clock hands, The smaller version printable on a mk3s without brim.
For clock mechanism use a cheap one from amazon with a long shaft (15mm) might fit a normal shaft, never tried.
clock thickness 6mm
Don't make a same mistake as I did, don't use concentric for top infill. Hilbert curve will give you a better top finish.
Happy printing!
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