Louis-Constantin Detouche, Second Empire Precision Regulator with Perpetual Calendar and Moon-phase

Circa 1850. 4-glass and ormolu case, signed on the dial and on the rear movement plate C. DETOUCHE, FSEUR DE LíEMPEREUR, RUE ST MARTIN 228 & 230, PARIS., blued steel moon hands and sweep seconds, calendar dial below with outer ring indicating month, days of year calibrated at intervals of 30 for equation of time and date, recessed centre with rolling moon-phase and fly-back indication of day of week, 2 week duration movement with Brocot type regulation for steel rod pendulum with gilt-brass bob, strike on bell, stamped on the back plate and numbered 27370 connected to calendar work below, also with manual adjustment for date/month and days/moon and indication of the four year cycle.