A Victorian black marble mantel clock, late 19th century, with a shaped pediment above an archite

A Victorian black marble mantel clock, late 19th century, with a shaped pediment above an architectural frieze of classical figures and 4.5" two piece annular dial with arabic numerals and brocot escapement, flanked by four corinthian capped fluted columns, raised on a stepped plinth, eight day movement striking on a gong, 15"