vienna bronze electric desk bell service bell

C.1900 austrian vienna bronze cold painted figural electric servant push bell/ringer. This bronze figural bell is representing a wiener dog resting on a hill or a rock. .The statue has residue of polychrome cold paint. There is a simple contact mechanism inside made of wood and copper, obviously for direct current of very low voltage. The hole for the cord is in the back of the base. Unfortunately rhe knob itself is missing and needs to be replaced. I believe these knobs has been made of ivory, therefore it will be a little complicated to find a replacement.