Quarter hour repeater movement with duplex escapement.
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Hour and quarter repeater with double wheel duplex escapement, snap calendar, engraved equation of time
Martin-Pouzait lever escapement
Side lever escapement.
Movement with lever detent escapement invented by Robert Robin
Watch presented by Napoleon Bonaparte to Jean Joseph Gauthier on 21 Floréal Year VII (May 10, 1799), verge escapement
Cylinder escapement, quarter hour repeater.
Virgule escapement
“Chronometre de poche” with modified Earnshaw detent escapement, sold to Monsieur Hottinguer (banker of the Maison Breguet), on 11 October 1844 for 1,500 FF.
Straight lever escapement (attributable to Marguerite Dupont who was a watchmaker in Alençon in 1795)
Hour and quarter repeater, mustache lever escapement
“Compteur militaire” cylinder escapement 84 divisions
Detent anchor escapement by Robert Robin, quarter hour repeater.
Verge escapement. Interesting watch of historical value for the signature referring to the Savoy kings.
Cylinder escapement
Sold to Son Excellence M. Achille Fould on 12 November 1860 for 950 FF. Presented to Professor Heinrich Siegel