I work in a historic mansion from 1922. We know there was a central vacuum system in the original home, although don't have any record of the manufacturer. Recently we discovered a key'd push button mechanism and are wondering if this could have been the original switch to turn on and off the central vacuum. We believe there were key'd push buttons above each inlet, but I'm wondering if anyone has any insight or knows if this is correct.
I have attached a photograph, but it seems, from the internal workings, that a key was used to push the button (it was not turned). I've also included a photo of one of the vacuum inlets in case that helps.
Any thoughts?


I have attached a photograph, but it seems, from the internal workings, that a key was used to push the button (it was not turned). I've also included a photo of one of the vacuum inlets in case that helps.
Any thoughts?

