Lancaster Antiques has dated this piece to the 1900s.

It measures 54cm in height, and across the oil lamp without the shade, it measures 23cm. It has a 16cm diameter base, which we have fitted with blue felt. The shade is approximately 16cm in height and 22cm across.

The maker's mark can be seen easily in real life, and is just visible in the second photograph; it reads 'Patent Wild and Wessel Berlin' with a PF mark above it.
We have had the lamp professionally polished but not lacquered.

It can be viewed in Surrey by appointment, and we can arrange courier delivery for the mainland UK, alternatively, we estimate postage and package will be about £15 due the the weight and extra packaging needed for the original glass shade.
Lancaster Antiques has dated this piece to the 1900s.
You can view the stock and full dealer information on the Lancaster Antiques Profile Page