Tthis model requires assembly because it is optimized to fit on the printing bed.** the watch has a diameter of 35 cm.**
you will need to use a clock mechanism with a long axis, the one I used is 14 mm but it can be even bigger. I am attaching a link here https://www.amazon.com/Mudder-Silence-Movement-Maximum-Thickness/dp/B01B960S50/ref=sr_1_6?crid=20VKYJ0ZGSM7D&dchild=1&keywords=clock+mechanism+14mm+shaft&qid=1598290465&sprefix=clock+mechanism+14%2Caps%2C268&sr=8-6
This model contains 13 stl components (I attached pictures with the position of each piece and pictures for the assembly. it is very easy to assemble
3D PRINTING SETTINGS Material: pet-g, ABS, PLA Raft : No Resolution : 0,2 mm , 0.1 mm Support : no Filling : 5 %. Speed : 55-60 mm/s print time : aprox 24 h amd 250 g