A black marble mercury regulator clock, late 19th century, with marker's mark for Japy Freres, the boldly designed clock having a visible escapement with a black marble chapter ring with gilded white cartouches and Roman numerals set within a drum head above a triangular body with volute decoration above a plinth base, with red and ochre marble trims throughout, with key and pendulum, height 41 cm, width 42 cm, depth 15.5 cm