I see 4 Ring Grip plugs and HPM's first attempt at a side entry plug there from the late 40's/50's. I'm a chronic hoarder of things old and such fittings look the part in my 1931 wired house with split seam steel conduit and fabric covered VIR wiring [Linked Image]I've got dozens of bakelite plugs, polarity reversing double adaptors and other currently 'frowned upon' fittings in use. You get boxes of bakelite fittings like that at the various markets/swap meets/junk shops here. We won't mention the first generation of HPM plugs will we...the ones where a loose strand of wire pokes out from beneath. I received my first shock off one of those!