Movement with experimental verge-lever escapement.
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George Graham lever escapement, double-dial astronomical watch, equation of time. Double face watch.
Ruby lever escapement.
Quarter hour repeater and calendar with Debaufre escapement modified by Pierre Le Roy
“Montre de souscription” with double wheel duplex escapement. Watch published in George Rigot's book: “Montres de souscription et a tact de Breguet“ ed.2017
Escapement “pallet pin weel”
Particularly shaped side lever escapement, complete calendere, hour-quarter repeating
Made on the Houriet principle with a special dial
Quarter repeater in gold and platinum hunting case, sold to Count François Potocki on 15 March 1822, price 2400 FF. Repurchased in 1828 and resold to Madame Dupaty in 1829
Experimental verge escapement
“Club footed” verge escapement.
Dead seconds watch with duplex lever escapement by Jean Renaud
Chronometer with Earnshaw spring detent escapement, spherical balance spring.
“Montre de souscription” with calendar and virgule escapementa
Souscription watch
“Compteur militaire” cylinder escapement 84 divisions