An English brass striking alarm lantern clock, William Dunant London No.485, mid 18th century

18-cm arched brass dial, single hour hand and engraved alarm disc, foliate spandrels and signature plate in the arch signed Wm Dunant London No.485, brass posted movement with verge escapement, countwheel striking and alarm on a bell surmounted by a turned finial, pierced side frets, hoop and spurs