Signed Tiffany Studios New York on the shade and on the base which is numbered 417. I have a collection of these lamps. My wife says yes, you can have too much of a good thing and its time to let one or two go.
There are a few heat cracks that you can see from the pictures but now that I use an LED bulb thats no longer a problem. Ask any questions you like and I answer with a few hours. You can check this item out locally- I live in New Canaan, Connecticut and there are plenty of experts in this area who can authenticate it for you. The item "Vintage Tiffany Studios 10 Acorn Shade & Base Counterweight Desk Lamp #417" is in sale since Saturday, May 23, 2020. This item is in the category "Pottery & Glass\Glass\Art Glass\North American\Tiffany".
The seller is "51oenoke" and is located in New Canaan, Connecticut. This item can be shipped to United States.