Re: Telephone curly leads
Curly-cords were certainly in use on US military equipment during WWII - I remember having just such a cord on a new, bagged, unissued carbon fist-microphone (oval diecast case about the size of a bar of soap, with a PTT button on the top) I bought from one of the surplus-stores in the 60s. I gather that this microphone was part of some sort of loudhailer/PA system on ships.
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