This is a slightly bigger version of my artisan keycaps case, which can found here:
https://www.printables.com/de/model/136360-artisan-keycap-display-box
Each spot is 19 x 19 mm and is printed in PLA layed down with no supports. Layer height should be 0.15mm or lower for the optional acrylic glass (90 x 45 x 2 mm) slot.
The author hasn't provided the model origin yet.