Large Levinton Brass Gilded Table Lamp

I picked this lamp up at a Re-Store shop. I liked the brass work and felt that it had character. I went to take some pictures to send to a friend and discovered a Levinton Patent stamp. The wiring is original and works like a charm. The cord is clean and in great condition. All of the brass gilding is complete. There are no scratches or chips out of the glass. The brass has a beautiful patina. I have found a document about Mr. Levinton, the founder of the company with a bit of historical time line. However, I cannot determine when this lamp was created or an estimated value as I cannot find anything like it online.