Polyphon
Polyphon is a disc musical box or music box.
Overview
Disc-playing music box.
In detail
It is associated with Germany. The record gives 1908 as its date of establishment or first appearance.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Polyphon”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q7226749: Polyphon
Consult the source