A black slate and green variegated Marble mounted Mantel Clock, the plinth-shaped case to a brass

A black slate and green variegated Marble mounted Mantel Clock, the plinth-shaped case to a brass bezel with bevelled glass enclosing a 4 ¼” Roman enamel chapter ring, with outside minute track and centred with a visible Brocot escapement and blued steel moon hands, to a circular brass movement with back mounted count wheel and anchor escapement, strike on a bell, height 10 ¾”