Lancaster Antiques has dated this piece to the 1880s.

It is in very good condition, although there are a couple of barely visable small soldering marks under the decorative leaves, and a tiny piece just above the leaf holding a shade but just looks like dark brass.

We have tried to show this in photographs 1 and 4, and it would not be seen once the light is in position.
At the top of the ceiling fitting is a brass disc that unscrews to allow it to be fitted flush to the ceiling.
Lancaster Antiques has dated this piece to the 1880s.
You can view the stock and full dealer information on the Lancaster Antiques Profile Page