RÉGULATEUR PERPÉTUEL DE PRÉCISION de forme rectangulaire avec calendrier p

Rectangular PERPETUAL PRECISION REGULATOR with perpetual calendar, white onyx base and cushion, four beveled glass sides. The two dials are set against a gilded copper plate richly engraved with flowers and foliage. The upper dial shows the hour, Roman numerals for the hours and a rail for the minutes, while the center features a visible Brocot escapement with carnelian pallets. The lower dial shows the complete perpetual calendar with multiple dates: days of the week, days of the month, months and moon phases. Adjustable lamella suspension from the front, and calendar update from the back.
Attributed to Constantin Louis Detouche (1810-1889), circa 1850.
Height: 48.2 cm-Width: 28.3 cm-Depth: 20.5 cm (Functional at first glance, need servicing, keys present, minor chips)