Quiet Street Antiques of Bath has dated this piece to the 1850s.
Unusually, it is complete with its original and separate ormolu base (see picture below).

The 8-day movement strikes hours and half-hours on a bell via the outside countwheel, with silk suspension. Signed both on the silvered dial and engraved on the backplate. 12ins high; 7.5ins wide and 5ins deep. (30 x 19 x 12.5 cms.
Quiet Street Antiques of Bath has dated this piece to the 1850s.
Fine antiques at sensible prices
You can view the stock and full dealer information on the Quiet Street Antiques of Bath Profile Page