Typical late 18C high quality "London" flame/figured mahogany case with pierced and fretted cresting, long door and typical two step base.

12" breakarch brass dial with strike/silent to arch, matted dial centre, subsidiary seconds dial, date aperture and blued cut steel hands.

High quality 5 pillar movement with hourly ( rack ) striking.

William Mason. Several of this name recorded late 18C in the Southwark and Dockhead districts of London.