Ingo electricians...

[Mgderf]

How old might this GFCI be?
The wires molded into the center of the back are the "line", green coiled is obviously the ground, but look closely and you'll see where I cut the pig-tails that were the "load" terminals.
The load side wires were also molded into the body.
I've never seen a GFCI built like this

 

[JCSR]

I was around the trade when GFIC's first were introduced. I had never seen one of that configuration. Is there any manufacturer info printed on it? Could be from some other country.

 

[Brandon]

You need to rewire your home.

I'll cut you a deal on wire, its in the classifieds

 

[Mgderf]

I was around the trade when GFIC's first were introduced. I had never seen one of that configuration. Is there any manufacturer info printed on it? Could be from some other country.

Actually, since you asked, I broke out the magnifying glass and found the name, and it's one I recognize.
Pass & Seymour there is a tiny label on the side that says 20 amp 2 pole 120v, an "issue number", and a certificate from the Underwriter's Laboratory.
Funny thing is, embossed in the steel faceplate it reads 15amp 120v 60 hz, GFCI class-A, and a couple of patent numbers.