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brock_leePretty good at finding stuff•

Just a guess. Since it doesn't have batteries, it's going to be testing for voltage. The bulb appears to be for low voltage as opposed to household current. If you think it's military, I would guess it's a tester for those plungers they use for dynamite. A google image search shows they generally had variable width terminals, so that would work nicely as it's adjustable. Like I said, just a guess.

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donbryOP•

Nice guess. I looked in a catalog of military explosives and found something that didn't look much like it but had what seemed to be the same function. That was like a Mk. 11 whereas this is cast brass and seems old and so might be a Mk 1 or Mk. 2 or summat. I'll keep reading.

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Pays_in_snakes•

Also a guess, but a capacitor discharge tool?

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brock_leePretty good at finding stuff•

I would doubt it because it's hand held and not insulated.

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donbryOP•

Good point.

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donbryOP•

Also a nice guess. I guess the military might really need to know that a capacitor was fully discharged, hence a light-bulb. Hadn't occurred to me.

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