M323 Mk1 with wind-up ringer???
I have a set of 2 x M323-Mk1 telephones, with a terminal block and a wind-the-handle dynamo. (I say dynamo, but not really sure if thats what it is)
These have been used as a 2-station intercom system about 40 years ago and I would like to resurrect them as such.
can anyone give any pointers as to how they should be configured for use like this? I presume that the dynamo is just to make the ringer happen and there should be a battery somewhere.....
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