Dead seconds watch with detent escapement
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Movement with experimental lateral lever escapement in the Robin style.
Movement with particular Pouzait lever escapement, quarter hour repeater
Montre simple a deux aguilles a secondes sien 140 boite en or n.2429 envoyé a Melin de Londres en cadeau pour le prix de 1030 FF le 11 mai 1821. (la n.140 Montre simple à secondes, boîte d’or Vendue le 9 frimaire an 5 (29 novembre 1796) à Monsieur Lavillete 576 FF.)
“Subscription" watch, Cassa di Joly no. 1769, sold to Prince Kurakin on August 9, 1811, for 1,080 FF, returned in 1812 and resold to the Princes of Valencay on May 8, 1812, for 980 FF.”
Compteur a pointage, nouveau modele chronographe a encre, sold at the College de France for 350 FF
“Club footed” verge escapement.
Straight lever escapement (attributable to Marguerite Dupont who was a watchmaker in Alençon in 1795)
"Montre a repetition des quart a toc" Robin-style anchor escapement, sold on 28 June 1793 to Monsieur Fabre Loncle.
“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
“Double face”, hour and quarter repeater, monthly calendar, centre seconds, early cylinder escapement.
Finished by son Pierre Le Roy, Sully escapement, calendar.
Cylinder escapement by a pupil of Robin
George Graham lever escapement, double-dial astronomical watch, equation of time. Double face watch.
“Montre de souscription a tact” sold to the brother of the Spanish Consul (Monsieur de la Serna) in Vendemiaire year X (1802) for 1,100 FF.
Ruby lever escapement.