Perfect geek/nerd clock for mathematically inclined, or engineers like me :) Made this for a fellow on Facebook's 3DP Rescue group. There are 2 versions, raised letters for single color printers and flush lettering for multi-color printers.  The STL only contains the raise letter version.

There are clock kits such as [https://www.amazon.com/dp/B0BW41DYMS?ref=ppx_yo2ov_dt_b_product_details&th=1](https://www.amazon.com/dp/B0BW41DYMS?ref=ppx_yo2ov_dt_b_product_details&th=1) which are very inexpensive. The clock face is 3mm thick, the hole in the middle is 5mm (resize as needed), in the version with raised letters, they are 2mm.