Vintage Vac

Can anyone tell me anything about a vintage electronics multi tester model M3C made by Radio Kits Co.?
This is a multimeter that tests volts, ma, and ohms. It is average size though it’s cabinet is made of wood with dovetailed corners. When I disassembled it it had 3 Ray-O -Vac Pinlite batteries hard wired in it that said 15 cents each on them. On the face it says Radio Kits Co Multitester Model M3C. There is no other information avalaible.
Sure. Radio Kits Co. made a variety of test instrument kits right after WWII. Yours is a typical wood-cased multimeter of that period. When new, it sold for eight dollars. Leaving out battery clips was one way to keep the cost down, though changing the penlite cells is a pain when they are soldered in place. My info shows the company went under in 1956. With new batteries, it’s still useable, though I’d be careful not to use it for measuring resistance (ohms) on modern digital electronics.
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