This is a simple plate with a threading for a standard ¼-20 UNC tripod screw on the bottom and a rim on top to allow snapping in-place a ~73mm circular base, such as the one that comes with the first generation Google Nest Indoor Cam. I used it to securely attach my camera to a tripod so I could keep an eye on prints.
It took some force to push the camera base inside the rim, and I haven't tried too hard to get it out. I don't intend to take it out any time soon, and I'm running low on filament, so I haven't iterated too much on the precise coverage of the rim. The camera won't fall out, so it's working well enough for me now :) Printer beware.
Printed at 15mm with no supports needed on a Prusa Mini.
The author hasn't provided the model origin yet.