There’s 2 parts to this story. Here’s the first.
I’ve had this lamp since before I was born (1935). No idea how old it really is. I’m the last one so nobody to ask. We lived in Minneapolis and presumably it was originally purchased there.
The one in the link is located in St Paul MN so that adds up.
Seller in the link guesses circa 1910-20 and I know it’s from at least 1935 so that sort of adds up.
The plug on the right in my pic is, I think, the original. It looks identical to the plug in the link. So that adds up.
Plug on left, again I think, is the replacement. I had to rewire the lamp in about 1950. Probly did not use the original plug because the insulator was shot. Maybe I ruined it. It was paper and not easy to remove w/o damage. I see now the prongs are a bit loose on their rivets so maybe I decided it was unsafe.
The original wire was insulated with rubber which was further covered with an old fashioned fuzzy cloth type cover material. Same as shown and described in the link so that also adds up.
The wire in the link is in bad shape too and that adds up.
The wire in mine is routed thru a hole in the base - the link, no.
The switch is the same. Patina the same.
I see no identifiable markings on the linked lamp in the base. Mine, however, does have base markings nearly all legible. Under the base (mine) I believe it says PATENT PENDING. Also the word ‘Gold.’ There are letters above the ‘Gold’ all of which I cannot make out. Looks like it is: Noº XXX 463? 483?
No signature apparent to my untrained eye.