A Black Marble Perpetual Calendar Mantel Clock With Barometer, signed R Heslop, Huddersfield, circa 1860, the drum case supported by rectangular plinth with two brass framed apertures of malachite, 5-inch enamel dial with Roman numerals and visible Brocot escapement to the centre, two further dials for barometer and calendar, twin barrel movement with striking on bell, backplate stamped "Japy Frerès" and numbered "64 12.3", 42cm high