A good French Empire ormolu mounted burr thuja portico mantel clock, Landry circa 1820

12-cm enamel chapter ring with Roman numerals signed Landry P.ce Des Panoramas Clerret, Breguet hands and engine turned centre, finely engraved ormolu bezel, movement with pinwheel escapement and countwheel striking on a bell, heavy gridiron knife-edge suspended pendulum with beat adjustment to the crutch, burr thuja case, stepped top with ormolu dentil mounts and borders, supported by four columns with ormolu Corinthian capitals, the plinth with engraved relief ormolu moulding raised on four bun feet