Tom Scott Antiques has dated this piece to the 1930s.

You will notice the lamp on the right has a slightly different tone to the brass which is only really noticeable when they are placed alongside each other like this for taking the photos!
Priced as the pair, INCLUDES mainland UK postage and ready to use, shown with example shades with a 16’’ diameter for scale.
Measuring:
22 1/2 inches or 57 cm high to the bulb holder
6 inches or 15.3 cm square base
30 1/2 inches or 77.5 cm height with example lampshade shown
Tom Scott Antiques has dated this piece to the 1930s.
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