Quarter andhour repeater, jumping hours device with experimental ruby verge escapement.
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Compteur a pointage, nouveau modele chronographe a encre, sold at the College de France for 350 FF
Quarter hour repeater cylinder escapement
Quarter hour repeater with double wheel duplex escapement.
Cylinder escapement, quarter hour repeater.
Dead central seconds watch with star duplex escapement invented by Charles Edouard Jacot with 1/4 second diablotine
Decimal watch with double time indication on a 24-hour basis, verge escapement.
Side lever escapement.
"Souscription" with auxiliary minutes and seconds
Weekly winding device, monthly calendar, with comma escapement
Hour and quarter repeater, cylinder escapement, enamel case
“Montre de souscription”.
Verge escapement, enamelled case decorated with diamonds and pearls
Ruby lever escapement.
Montre simple medaillon eccentrique 13 lignes ½, cylinder escapement in ruby sold to Lionel Rothschild (banker) on 31 May 1831 for 1,400 FF.
Chronometer with Robin escapement