Lever escapement and thermal compensation
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Sully's escapement
Scappamento ad ancora e compensazione termica
Quarter hour repeater movement with duplex escapement.
Movement with experimental lateral lever escapement in the Robin style.
First generation French lever escapement movement
Revolutionary with Robin type 2 dial, republican calendar, verge escapement
Montre a répétition de quart, a grand second d’un coup, sur le principes de chronomètre.
Anonymous watch with central and auxiliary dead seconds, chicane lever escapement
Extra-flat watch with regulator dial, lever escapement, Rèaumur thermometer.
“Rèpètition de Première Classe” with ruby cylinder escapement, sold to an anonymous “monsieur” on 13 July 1811 for 1,728 FF, resold to Monsieur Gozzel on 22 May 1822 for 900 FF.
First generation early straight line lever escapement
Tide indicator, enamelled dial, cylinder escapement.
Republican and Gregorian calendar, lever escapement by J.M. Pouizait, skeletonized movement.
Hour and quarter repeater, verge escapement, enamelled case.
Movement with lever detent escapement invented by Robert Robin