Lever escapement and thermal compensation
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George Graham lever escapement, double-dial astronomical watch, equation of time. Double face watch.
“Montre de souscription”, sold to Adjutant Gènèral Ricard on 15 December 1813 for 600 F.F. Watch published in George Rigot's book: “Montres de souscription et a tact de Breguet“ ed.2017
Elève de Winnerl, chronometer with lever escapement.
Movement with lever detent escapement invented by Robert Robin
“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.”
Revolutionary with Robin type 2 dial, republican calendar, verge escapement
Thirty-tooth “rack lever” escapement
First generation French lever escapement movement
Hour and quarter repeater with double wheel duplex escapement, snap calendar, engraved equation of time
Dead seconds watch with duplex lever escapement by Jean Renaud
Cylinder escapement
Montre a repetition des quart a toc, ruby cylinder escapement sold to Monsieur Recordon de Londres on 27 Fructidor an 10 (14 September 1802) for 1,500 FF.
Chronometer made by Joseph Thaddeus Winnerl on a movement by Robert Robin
Watch presented by Napoleon Bonaparte to Jean Joseph Gauthier on 21 Floréal Year VII (May 10, 1799), verge escapement
Navigation chronometer with sidereal time indication.