Worboys Antiques has dated this piece to the 1800s.
It has a white enamel dial signed by the maker "Castell of London" and an 8 day fusee pendulum movement. (London England, c. 1820)

Dimensions
43.00cm wide 43.00cm high 16.00cm deep (16.93 inches wide 16.93 inches high 6.30 inches deep)
Current Condition
The case has been revived and waxed, the dial professionally rstored and the movement has been serviced and is guaranteed for 12 months.
Worboys Antiques has dated this piece to the 1800s.
Established since 1978, dealing in and restoring most antiques, specialising in clocks and furniture.
You can view the stock and full dealer information on the Worboys Antiques Profile Page
Worboys Antiques is a registered member of LAPADA