Vintage NRI Vacuum Tube Voltmeter Model W Washington DC w/ Leads

Description

Up for your consideration is a vintage NRI (National radio Institute, Washington DC) vacuum tube voltmeter model W. Looks to be circa 1950's-60's era. All metal case with a plastic dial protector. I tested it with a 12v battery when set to the "12v" and "DC+" setting and it appears to be working as intended. The case is missing 2 screws on the front and has scuffs and scratches. Dial protector has scuffing and marks. All dials intact, no exposed wires on any cords.
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