Re: French car boot telephone thing, What is it?
Hi Phil, a THG Member (Telecommunications Heritage Group) used to sell an 12V DC electronic multivibrator / ring generator. It was not too pricey & would easily fit inside your find.
Frustratingly I cannot locate the details of the seller but if there are any other THG members reading this, I am sure they could point you in the right direction.
Rog
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