A late 19th century French brass, onyx and champlevé enamel four glass mantel clock with eight day movement striking hours and half hours on a gong, the backplate with S. Marti & Cie maker's mark, with polychrome enamelled pendulum, the gilt dial with black Arabic hour numerals and Brocot escapement, the serpentine front case with bevelled glass panels, polychrome enamelled columns and bands, on cast toupie feet, height 32.7cm.