Calendar movement with dead seconds and special cylinder escapement.
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“Montre de souscription” apocryphal. Watch published in George Rigot's book: “Montres de souscription et a tact de Breguet“ ed.2017
Virgule escapement
Finished by son Pierre Le Roy, Sully escapement, calendar.
“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.
Quarter hour repeater cylinder escapement
Anonymous watch with central and auxiliary dead seconds, chicane lever escapement
Quarter hour repeater with double wheel duplex escapement.
Sold to Son Excellence M. Achille Fould on 12 November 1860 for 950 FF. Presented to Professor Heinrich Siegel
Extra-flat watch with regulator dial, lever escapement, Rèaumur thermometer.
“Montre de souscription” with calendar and virgule escapementa
“Montre de souscription” with double wheel duplex escapement. Watch published in George Rigot's book: “Montres de souscription et a tact de Breguet“ ed.2017
Quarter andhour repeater, jumping hours device with experimental ruby verge escapement.
Chronometer with quarter hour repeater and calendar, pivoted detent escapement with experimental thermal compensation
Thirty-tooth “rack lever” escapement
Decimal watch with calendar and special escapement