“Resilient lever” lever escapement modified by Mortimer George Cole.
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Quarter hour repeater clock watch, verge escapement.
Decimal watch with calendar and special escapement
Escapement “pallet pin weel”
"Repetition demi quart sur timbres” with lever escapement on the “garde temps” principle, hunter case with secret “portrait” compartment, “jumping hours” device sold to Count Panin on 11 June 1821, for FF 4,800, reentered, restored and resold with number 4931 to Monsieur Lacroix of Turin on 16 May 1831 for 4800 francs.
« Simple garde-temps, arbre percé 20 lignes échappement ancre” sold to Monsieur de Bignon 11 March 1858.
“Montre de souscription” case n.918 sold au freres Chaudoir 20 Nivose an 13 (10 Janvier 1805)
First generation French lever escapement movement
“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.”
Side lever experimental escapement
Lateral lever escapement, quarter hour repeater.
Cylinder escapement.
Dual scale thermometer on the Houriet principle
Straight lever escapement, quarter hour repeater
Lever escapement and thermal compensation
Thirty-tooth “rack lever” escapement