Masons Antiques has dated this piece to the 1850s.
Made by UPJOHN & BRIGHT, 13, King William St., STRAND.
They are recorded in Brian Loomes "Clock Makers of the World" as working here between 1823-1861.

A cast brass bezel enclosing the 12" white painted dial with black Roman numerals, nicely cut hands, and signed as above.
The twin, chain driven, fusee movement has just been fully overhauled by our BHI registered staff and carries our usual 12mths full parts and labour guarantee.
The clock strikes the hours on a bell and has a clear, crisp tone.
An outstanding, quality clock.
All cards accepted.
Masons Antiques has dated this piece to the 1850s.
You can view the stock and full dealer information on the Masons Antiques Profile Page