Very interested but with a house under construction SWMBO would kill me.
Do they work on a pair of wires in between and crank the handle and the other set rings? IE no battery required?
If so, we were still using those in the 1970s in the UK on shooting ranges to talk to the butts from the firing point.
Also very interesting is the second set of numbers on the outside of the box cover. Looks like 58 EY 03 which is the same style as a British VRN or in civvy parlance licence plate number. Me wonders if they came from a signals truck at one time?
Boy I would so like them . . . .
R
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