Robin's lever detent escapement of special shape
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Calendar movement with dead seconds and special cylinder escapement.
Cylinder escapement, quarter hour repeater.
Quarter hour repeater movement with duplex escapement.
Josiah Emery Straight Lever Escapement Chronometer.
Built on the principle of “garde temps”, quarter and half quarter hour repeater with double wheel duplex escapement sold to Monsieur Egerston (Egerton) on 17 December 1813 for 3,000 FF .
Thirty-tooth “rack lever” escapement
“Montre de souscription” with verge escapement.
First generation French lever escapement movement
Quarter hour repeater and calendar with Debaufre escapement modified by Pierre Le Roy
Dead-beat seconds watch with double-wheel duplex escapement.
Double wheel verge escapement.
Straight lever escapement (attributable to Marguerite Dupont who was a watchmaker in Alençon in 1795)
Extra-flat watch with regulator dial, lever escapement, Rèaumur thermometer.
Straight lever escapement, quarter hour repeater
Cylinder escapement