[keithinuk]

I only got this phone, as I thought it looked interesting, the selector was seized and it was a job to get it apart, but with a little TLC and an impact driver it all came apart and looks to be in working order.
As I say, it all looks to be in working order, but not knowing until now that it is a sound powered phone, I didn't know this type of phone existed.
I gather it has to be used with other sound powered phones, would it matter if it was another make or model and can I test it, other than using a multimeter.
It did have the wiring diagrams inside, so that's one good thing.
But to be honest I don't know much it anything about this one.