Tom Scott Antiques has dated this piece to the 1900s.
There is a small chip to the front left as you can see from the pictures, but not very noticeable unless really looking for it!

Shown with an example 16'' diameter shade to give a sense of proportion...I think it would look better with a French drum shade of 14'' diameter but I don't have one the right size to show you.
Measuring:
15'' or 46cm to the top of the bulb holder
6'' or 15cm square base
Tom Scott Antiques has dated this piece to the 1900s.
Specialist dealer in french & english decorative furniture and interiors
You can view the stock and full dealer information on the Tom Scott Antiques Profile Page