French chronometer in manner of Louis Berthoud Circa 1830

Silver open faced chronometer by Julien Huguenin
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Important, large French open faced chronometer in manner of Louis Berthoud, circa 1830. Engine turned silver case with gold hinges, case punched. Cuvette inscribed: Construit a Paris en 1830 par Julien Huguenin. Pivoted spring detent chronometer movement with extra-large chronometer balance and helical hairspring, constructed in manner of Louis Berthoud, enhanced by Huguenin. White enamel dial with Roman numerals and blued Breguet steel hands.
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Diameter: 66.5 mm
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Weight: 212 g
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Signed: Huguenin a Paris
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This watch impresses with its outstanding, almost like-new condition. It was part of the famous collection of Gerd Ahrens. Ahrens comments on this watch: “The pivoted spring detent escapement is a further development of that of Louis Berthoud”. Illustrated in: ‘Deck and pocket chronometer’ by Hans von Bertele.