This is a case for the famous component tester LCR-T4. The specific case was designed to not need much extra parts or more than one print. Three bendable points allow for a steady installation of both the tester and the battery.
The case also leaves the front portion of the tester completely exposed to make testing SMD components easier.
After installing the tester you can slide a 35 by 73 by 1.5 mm transparent plastic on the guides above the screen for extra protection(see photo). I cut the one I used from an old CD case.