Simple clock to 3dprint for your homegym and fitness area!! it is two parts generally you will need a large format printer for the base or scale it down. Then the numbers are designed so they sit flush with surface. You can grab the thinner clock mechanisms off of amazon or change the thickness of this for what ever clock mechanism you are using. It is recessed in the back to hide away some of the mechanism and battery.

Clock mechanisms doesn't really matter on length but one like this minimum is 1/4" length on the shaft https://www.amazon.com/Movement-Mechanism-Replacement-Different-Lengths/dp/B0CBPCX1G7/ref=sims_dp_d_dex_ai_speed_loc_mtl_v4_d_sccl_2_4/147-8987830-2654048?pd_rd_w=fqWIX&content-id=amzn1.sym.f8b81522-706a-46d3-a585-5fc6e1682ebe&pf_rd_p=f8b81522-706a-46d3-a585-5fc6e1682ebe&pf_rd_r=DFV6YJC9DT11VXGJH68P&pd_rd_wg=yk2hz&pd_rd_r=3ceee5a3-8d89-401d-a6d8-83b3fc01e72d&pd_rd_i=B0CBPCX1G7&th=1