Charles Frodsham, No.84, Strand, London, Clock Maker to the Queen, No. 1097 The arched case with long glazed door framed by a D-moulded edge to a concave-shaped base, hung on a substantial suspension loop to the backboard, the lockable door opening on three brass hinges and inset with a dust rebate and baize lining, a carved and pierced foliate cresting sits below the dial and is secured from behind by four brass screws; the 6.25 inch one-piece silvered dial with Arabic minute track enclosing the large subsidiaries for running seconds (marked in Arabic 10s, with observatory marks between) and Roman hours with blued steel trefoil hand, the winding square with engraved and shaded direction arrow, secured in the case via three blued steel screws to the dial edge locating into double-screwed brass plates mounted behind the dial; the substantial movement set on a thick mahogany backboard by three long brass screws and L-shaped brackets, with arched plates united by five turned ringed pillars screwed through the backplate with heavy blued steel screws and bronze collars, with Harrison's maintaining power to the chain fusee, the wheels of five crossings and with high count pinions, the deadbeat 'scape wheel set in jewelled bearings, the pallets similarly mounted and with inset jewelled faces, to a long steel crutch with micrometer regulation to a circular section pendulum rod and mercury-filled canister bob, suspended from a heavy brass bracket mounted on the backboard, reading against the original signed boxwood beat scale with stamped scales for inches and degrees of arc. Running. Sold with a case key and the original(?) steel and brass winding key. 108cms (3ft 7ins) high