A French gilt and silvered brass perpetual calendar four glass mantel clock, the case with fluted Corinthian columns to the four angles, the dial with foliate engraved gilt mask having a Roman annular chapter ring with visible jewelled Brocot escapement to the centre and blued moon hands, the calendar ring below with days of the week, date and month with additional leap-year ring and moonphase, the going barrel movement with steel suspended mercury pendulum and strike on bell