This clock holder was made to hold a clock for use with Octolapse. It slides onto the base.
It was specifically designed to be used with this clock... https://www.amazon.com/gp/product/B07K2RK1HB/ref=ppx_yo_dt_b_bia_widget_title_o00_s00?ie=UTF8&psc=1
Category: 3D Printer AccessoriesThe author marked this model as their own original creation. Imported from Thingiverse.