Double comma escapement (double virgule)
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Made on the Houriet principle with a special dial
Lever escapement and thermal compensation
Movement with experimental lateral lever escapement in the Robin style.
"Montre simple” N.3707 sold to Monsieur Furchy Notaire on 31 June 1822 for 1140 FF.
Cylinder escapement by a pupil of Robin
Turkish market watch, hour and quarter repeater with ruby cylinder escapement, translucent red enamel case, sold to Leroy in Constantinople for 2,400 FF (Breguet agent).
Dead seconds watch with detent escapement
Scappamento ad ancora detent di Robin
Thirty-tooth “rack lever” escapement
“Montre de souscription”.
Hour and quarter repeater, cylinder escapement, enamel case
Orologio a secondi morti con scappamento a virgola
Double-dial astronomical watch with cylinder escapement, centre seconds, and equation of time.
Quarter andhour repeater, jumping hours device with experimental ruby verge escapement.
Finished by son Pierre Le Roy, Sully escapement, calendar.