These are two bracket options for the Wondermac project -- sticking an LCD and Raspberry Pi in a Maclock housing. The video showing the parts needed and build process is here:
As explained in the video, there are two choices for installing the Waveshare LCD:
Using the full visible area of the screen, though this leaves thin borders.
Sandwiching the original Maclock LCD between the bezel and Waveshare display, to use its screen borders (which look more accurate) but with the caveat of cutting off some of the displayable area.
I recommend printing the bracket on its side -- you'll need supports, but this is the most efficient way I've found to print it.
The author marked this model as their own original creation.