It's an 11" covered stainless steel skillet with an encapsulated copper or aluminum disc welded to the bottom and the handle welded to the pan. The handle's stainless core is protected with two wooden pieces held in place by three brass rivets, and has a hole in the end for hanging up the pan. The lid's handle is a knob made of the same kind of wood held firmly in place, I don't know how as no rivet or screw is visible on the bottom of the lid.
I bought the skillet in the '70s because it was recommended in the original Cook's Catalogue by James Beard and Milton Glaser, published in 1975. (I no longer have the book.) There's no brand name anywhere on the skillet or lid, only the word "INOX" stamped into the bottom side of the handle. This is French for stainless steel, so presumably it was made in France. My guess is that it may have been a product of Cuisinart, or Cuisinarts as it then was, which of course is best known for its food processors but sold imported French cookware as well.
It really doesn't matter at all, I'm merely curious, and if necessary I could pick up a used copy of the Cook's Catalogue to satisfy my curiosity. But if anybody happens to know, I'd appreciate it.