I once had a 40's vintage phone recorder that was actually a wire recorder.
It had a place to set your desk phone, and, a coil went under the reciver to pick up signals. Another coil was under the base of the phone, that I assume somehow started the recorder. Looked like it had a solonoid to lift the receiver.
Thing had no power transformer, and, had 8 tubes in it. Was in a maroon cloth covered wood case.
Unfortuanately, it got lost in moving, and, I never saw it again.