Ok, I happened across these while helping someone clean their basement after a flood. they were just getting tossed, so I took them home.
After a few hours on Google and finding NO INFORMATION, I began to get puzzled. I found all kinds of interesting old plug sockets, but nothing that looked remotely like this, So I'm beginning to think what I have is pretty rare.
These were once in service in the house in question. The house is 1920's or earlier, and was definitely owned by someone with wealth(servant quarters, old switches have pearl in them, even had a central vacuum system)
So, I've been asking around the internet in various places, nobody has ever seen these before, So now I am here inquiring about what I have.
picture 1. on the faceplate, you can see that the little flaps are hinged to allow the plug to be plugged in.
Pic 2 is what the socket looks like.
Pic 3 is what the plug looks like. The pic doesnt show it well, but it is only a 2 prong plug.
Pic 4 is the back of one of the cover plates
Pic 5 is the plug plugged into the socket.
ANY info would be great. The sockets are ceramic as well.