Louis XVI month-going mean and solar time mantel regulator with remontoire, 1778 (ormolu & enamel)

A LOUIS XVI ORMOLU MONTH-GOING MEAN AND SOLAR TIME MANTEL REGULATOR WITH REMONTOIRE THE CLOCKMAKER ROBERT ROBIN, PARIS, THE ENAMELLER JOSEPH COTEAU. THE DIAL DATED 1778 CASE: glazed panel to acanthus leaf and bead moulded top, laurel leaf and berry mouldings to glazed side panels and front and rear glazed doors, on block feet DIAL: white enamel, with outer concentric year calendar and outer zodiac ring painted in oval gilt-framed roundels interrupted by floral painted garlands, signed 'Robin/A PARIS', also 'Coteau ft...' below VI, further signed to reverse 'Coteau/le l. Juillet 1778', pierced and engraved ormolu hands for hours and solar minutes, blued steel hands for mean time, calendar and centre seconds, the concealed dial plate with winding squares, inscribed 'Remontez à gauche/Celui de Droit' and with lever inscribed 'faites passer le quantieme' MOVEMENT: twin interconnecting going barrels driving re-wind system for weight-driven one minute remontoire mounted on the back plate, Graham-type dead beat escapement with fine beat adjustment to the crutch, pivoted knife edge suspension bracket secured to the rear of the case for nine rod gridiron pendulum, the pendulum bob inset with enamel plaque painted after Boucher with a young lady on a swing, signed on reverse 'Coteau ...778', equation of time kidney and calendar work mounted to the front plate under the dial; two brass weights 16¼ in. (41 cm.) high; 8 7/8 in. (22.5 cm.) wide; 6 7/8 in. (17.5 cm.) deep