"Le Roy & Fils, Paris, London. Baro/thermometer, Perpetual Calendar. Escapement Coupe Perdu"
Pendulum in black marble and red griot. Movement of 'Le Roy & Fils, Palais-Royal, Galerie Montpensier, 13-15, Paris' and '211 Regent Street, London' (1856-1875). Coupe Perdu escapement by Auguste Pointaux. compensation pendulum. on the left an aneroid barometer. on the right a perpetual calendar with correction for leap years, moon, day of the week, date, month.