A fine black Napoleon III black marble gong strike mantle clock, 19th century, with maker's mark for S. Marti et Cie, with a flat arching cornice above a dial with visible escapement and Roman, numerals to the chapter dial flanked by recessed and stepped architectural, side decorations and raised on an extended base, with engraved details and applied ormolu masks and lion heads, with key and pendulum, height 44 cm, width 47 cm, depth 18 cm