High-precision astronomical wall regulator, Breguet, No. 705, c. 1865
Breguet, No. 705, "Valet Astronomique", sold to the Comte de la Renoste on September 23, 1865, for 2,100 Francs. Very fine and important burr walnut month-going weight-driven high-precision astronomical wall regulator with center-seconds and pendulum calibrated for both sidereal and mean time. C. Rectangular, veneered, hinged glazed doors with locks at the top for the dial and at the bottom for the bob, brass carrying handles on each side, heavy wooden back with mounted heavy bracket fixed with the pendulum suspension and two movement mounting brass brackets, adjustable on the wall by means of four double knurled screws, ormolu bezel with palm leaf decoration. D. White enamel, Roman numerals, outer Arabic minute and seconds ring. Blued steel Breguet hands. M. Circular brass movement contained in a brass cylinder, full plate, the barrel with maintaining power, heavy brass weight and counterweight, four-wheel train, Graham dead-beat escapement with jeweled pallets, the escape wheel in the center of the back plate, second-beating gridiron pendulum made of three steel and two zinc rods, double spring suspension, heavy brass bob with micrometric adjustment worm-gear mechanism and sidereal and mean time calibration. Signed on the dial and the back plate. Dim. Length 141 cm, width 32 cm, depth 21,5 cm.
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