I have a panel of switches where two are normal light switches and the other, third, is a strange looking red push switch:
The red switch is a button that you can press in, and it pops right out when let go. It has Hubbell logon on the inside, but no part number or anything else identifiable. Searching the web, Hubbell PresSwitch seems to look similar - but description of said item indicates that it lights up, which this one doesn't. This one also doesn't seem to do anything I can observe.
Wiring wise, it is side wired with hot and neutral wires. This box has four romex cables going into it. Three are connected to the 2 normal light switches (2-pole). The fourth romex cable is connected to the red button via black and white wires. Now: white wire is connected directly to the red switch. The black wire is pig-tailed in with the red switch and one of the other black wires from another cable.
If this helps figure it out, this panel is right by the front door (switches illuminate outside lights and inside hallway light). Any ideas? I am scratching my head.