A good French Empire ormolu portico table regulator with date, Drouot à Paris, circa 1820

12-cm enamel dial with Roman numerals signed Drouot à Paris, outer ring callibrated for minutes and half seconds, inner Arabic numerals for date, Breguet hands, date pointer and sweep seconds, movement with pinwheel escapement mounted at the backplate, heavy gridiron pendulum with ormolu bob and beat adjustment to the crutch, countwheel striking on a bell, good ormolu case with moulded stepped top supported by four columns, moulded rectangular base raised on bun feet