Hand-Painted Lamp

I was leaving the pretty bad flea market today when I stopped back at a vendor (it was on the way to my car) and commented on the lamp.
He said it was rewired, so I looked at it and commented how the plug looks 1950s (turns out the plug is circa 1956.)
His English, I guess, wasn't the best, so he didn't tell me too much. The place the bulb sits looks newer than most of the brass, so perhaps it was rewired in the '50s?
Anyway, I told him I'd pass, and I began walking away before stopping when he said, "Is it worth 5 bucks to you?"
I decided I'd take it, and I paid him and left.
There are no markings beyond the plug, and a hidden patent date on the plug.

I'm just curious is anyone may know when the lamp is from and where it's from?

It is hand-painted and looks like a gaudy late Victorian plate. My great grandma used to rewire lamps, so I'm wondering if someone like her did this?

Forgive the poor background. I tested it in the garage in case it did some damage to the wiring. Seems to work fine.