Worthpoint said:This is a 4 Room Annunciator electric door bell system which would be placed in the servants hall and used to call for service. A charge of electricity causes the bell to ring and one of the needles to point to the room # w service is required. Calls are cancelled by pushing up the plunger at the bottom.
There was no dial on a party line. You picked it up and listened to see if it was in use. To use it you turned the crank. Frank...
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