Jacob Erhart, ThornThe hexagonal case with six glazed oval apertures bordered by a moulded cornice and base, on three scroll feet, the four-inch Roman chapter ring with engraved brass hand and gilt centre depicting a valley landscape with a town and other buildings below a cloudy sky inhabited by flying birds, framed by six winged cherub spandrels, the hexagonal movement plates signed below the rim of the balance wheel and united by five tall baluster pillars, the going train with chain fusee terminating in a verge balance wheel escapement, the strike train with engraved spring barrel and steel hammer arbor turned to match the pillars, sounding on the inverted bell mounted to the underside on a shaped steel bracket, the pierced and engraved steel countwheel mounted on the backplate, 14cms (5.5ins) wide