Vintage vacuum tube Unbranded variable Power Supply?

Description

Vintage vacuum tube Unbranded variable Power Supply?. Condition is "For parts or not working".
It was plugged in for about 5 Seconds the light on the face comes on and the tube inside lights up. No further testing was done I'm afraid of damaging it. It is being sold for parts or repair.
The approximate measurements are 10 and 5/8 in wide 7 and 5/8 in high by 6 in deep not including the front knobs and connections.
This will be packed well for shipping.