Important, rare French brass inking chronograph Circa 1854

Extremely rare version of an inking chronograph by Breguet
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Important Breguet inking chronograph, ‘Compteur de pointage nouveau modele’, extremely rare version with 30 minutes and 30-half-seconds counter, circa 1854. Sold on 29 April 1854 to the Collège de France for 350 Francs. Full plate movement with cylinder escapement. White enamel dial with 30 minutes and 30-half-seconds counter, steel hands. Screwed gilt brass case, winding on the back. Case, cuvette and dial signed and numbered. The watch comes with a Breguet certificate of 2018.
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Diameter: 79 mm
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Weight: 528 g
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Signed: Breguet & Comp
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This piece has a sister watch numbered 611.
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The collège de France is an institution dedicated to research and teaching in Paris. As a Grand Établissement it is the most prestigious scientific institution in France.