[gregb]

I have run into them a couple times and have been able to preserve them each time. They look like a little bundle of wire coiled up and enclosed in some of that grey heavy paper they used back in the day. The ones I have seen have been right on value so no point changing them so long as you don't damage them when cleaning out the bakelite block. There must have been a reason they used them but I don't know what that reason is, does anyone know?

Gregb