An empire mahogany two-day marine chronometer, Louis Berthoud, No 93, circa 1810

An empire mahogany two-day marine chronometer, Louis Berthoud, No 93

circa 1810

3-inch enamel dial with outer minute ring enclosing subsidiary hours and secondfs dials, signed Louis Berthoud horger. de la Marine, No. 93, the gilt full-plate movement with repeat signature engraved on the edge of the dial mount, tapered pillars, chain fusee with Harrison's maintaining power, Berthoud's pivoted detent escapement, the bi-metallic three-arm compensation balance with three brass weights and timing screws, free-sprung blued helical spring, the backplate signed Construite par Louis Berthoud, No. 93, the brass bowl with bevel-glazed bezel and mounted in a three-tier deck case with key compartment in the lower section

11.5 x 14 x 7cm.