This is a Bell System KS-14510-LS5 meter. It is in a bakelite case (no cracks or breaks) in a case (rip on right „hinge side“.
Markings on back is marked something about training.

Very Clean

I tested it with several regulated DC voltages, and the meter read them accurately.

Resistance requires 1.5 & 30 Volt (I believe it is a NEDA 210) batteries, not included
No test leads included

Please see my other items. I will be adding additional items – so please check back.
Sorry about some pictures, my hand shanes sometimes

Bell System KS-14510 – $50