A late 19th Century Black Slate and Green Variegated Marble Mantel Clock, the architectural case

A late 19th Century Black Slate and Green Variegated Marble Mantel Clock, the architectural case with multiple pediments over four freestanding columns, to a stepped plinth base, with floral and foliate gilt highlighted detail, to a cast and beaded bezel, enclosing a 4 ¼" Arabic enamel dial, with outside minute track and steel fleur-de-lys hands, to a visible brocot escapement, to a circular brass movement with anchor escapement and strike (lacking gong), height 16"