This is a case for the 11.9" widescreen by Waveshare, designed to stand at a 25° angle. It is perfect to put under a main monitor to display parameters or serve as a smaller peripheral screen.
The way it is designed, the model needs to be cut and then the case is slit in. Like this, the case fits snugly around all parts of the screen and there is no need to glue the parts.
Since the Screen is too wide to print the case in one piece and has awkward angles, I recommend turning it on its right side, cutting it in 3 pieces (at 81 mm and then cutting the bigger piece again at 122mm) in Prusa Slicer, and then print them upright (see picture). No supports needed.
I attached the solidworks file as well, it can definitely profit from some improvements.
The author marked this model as their own original creation.