A black slate mantle clock, 19th century, with maker's mark for S Marti et Cie, an architectural style clock with a shaped rounded arch pediment, an enamel chapter ring with Roman numerals set within a gilt bezel and flanked by pairs of mottled marble pillars above an extended base, with engraved and gilded trims; key and pendulum, height 31.5 width 38 cm, depth 16.5 cm