Rams Head Antiques has dated this piece to the 1870s.
The face has a visible rocking escapement to the recessed inner dial (very faint hairline to the porcelain back plate, bearly noticeable). The outer porcelain dial is in a tooled brass bezel with a Roman chapter ring and has its original hands. This is a very smart good quality clock in super order measuring 16" wide 12" in height and 6" deep.
Rams Head Antiques has dated this piece to the 1870s.
You can view the stock and full dealer information on the Rams Head Antiques Profile Page