A French Napoleon III gilt brass mounted marquetry inlaid ebonized portico mantel clock third quarter 19th century

8.5-cm enamel dial with Roman numerals signed C. Detouche F., 158 & 160 Rue St. Martin and Breguet hands, similar signed countwheel bell striking anchor movement with elaborate relief gilt gridiron pendulum, ebonized case with foliate marqetry throughout, shaped top supported by four gilt brass capped twisted columns, rectangular moulded plinth raised on flat feet, together with a marquetry inlaid base and glass dome