In its previous life, this is a workshop tester/restorer built into a clamshell case for cathode ray (CRT or TV) tubes that have become dim by being left on for too long. It actually makes for quite a stylish portable prop in it own right for field scientific work or research. The meter scales have coloured bad/good zones. Conveniently, in setup mode, the knobs can be used to control the meter needles.
Prop ID: 3036