signed William Hampson Thompson, Liverpool with elaborate carved mahogany case, the 16" one-piece signed silvered dial with outer Arabic minute track enclosing the subsidiaries for running seconds and Roman hours, the movement with jewelled deadbeat escapement, the long crutch with micrometer regulation to a (later) gridiron pendulum reading against an engraved silvered beat scale, the weight suspended via a large pulley with engraved centre, 229cm high