A black marble mantle clock, circa 1880, American, with maker's mark for Ansonia, with architectural styling, with a visible escapement, the enamel dial with Roman numerals enclosed by a gilded bezel and set within a plinth with a volute and triangular pediment and raised on an extended base, decorated with engraved embellishments and black and white mottled marble inlay; with key. Height 38 cm. Width 35 cm. Depth 13 cm