Grande Montre Marine" 2 day-going, marine chronometer oe tabatire, with regulator dial. Accompanied by a later mahogany box. Louis Berthoud, begun in July 1809, finished in January 1811

"Grande Montre Marine" 2 day-going, marine chronometer oe tabatire, with regulator dial. Accompanied by a later mahogany box. Louis Berthoud, begun in July 1809, finished in January 1811 "Construite par Louis Berthoud, Horloger de la Marine" No. 130, "Grande Montre Marine", begun in July 1809, finished in January 1811, sold to le Comte de Rosily (for the Department of the Marine) on October 8, 1811. Very fine 2 day-going, marine chronometer oe tabatire, with regulator dial. Accompanied by a later mahogany box. C. Two piece (back lacking), "tabatire", gilt silver with glazed bezel secured by two screws fitted in mahogany, three-piece, unglazed bezel in the middle part, top with circular ivory plaque, lock between the bottom and the middle parts, sliding brass shuttle in the base panel. D. White enamel by Vincent, eccentric radial Roman hour chapter set at 12 o'clock, center minutes with five-minute Arabic markers, subsidiary seconds. Blued steel Breguet hands. M. 75 mm, brass full plate with conical pllars, fusee with Harrison's maintaining power and chain, very fine train with a high number of teeth and leaves, Earnshaw type spring detent escapement (updated from pivoted detent Louis Berthoud escapement), large Z type bimetallic compensation balance with gold temperature and mean time adjustment screws, blued steel Breguet balance spring updated from three-arm balance with conical or cylindrical Louis Berthoud balance spring, jeweled to the third wheel, entire train with steel endplates toeduce friction, balance with jeweled endstones. Signed on dial and movement. Dim. Bowl 84 mm diam., box 13 x 13 x 8 cm.