An English ebonized striking alarm table clock Francis Dorrell London, mid 18th century

18-cm arched matted brass dial engraved silver chapter ring and recessed signature plate signed Francis Dorrell London, foliate pierced hands and engraved alarm disc, date aperture and moonphase in the arch, rococo spandrels, five pillar two train fusee movement with verge escapement, trip repeating Dutch half hour rack striking on two bells, pull wind alarm on a bell, foliate engraved back plate with scrolls, flowers and a bird, moulded ebonized case with bell surmounted by a brass carrying handle, foliate pierced wood frets to the sides and to the upper spandrels of the moulded break arch placed door, the moulded plinth raised on flat feet