Thirty-tooth “rack lever” escapement
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Quarter hour repeater by touch with special cylinder escapement.
Lever escapement, quarter hour repeater
“Montre de souscription” with double wheel duplex escapement
Monthly and week calendar, with central seconds, verge escapement.
Small-sized watch built on the principle of chronometers with monthly calendar, lever escapement sold to Baron Schickler on 30 December 1828 for the price of 3,600 FF.
Ruby lever escapement.
"Souscription" with auxiliary minutes and seconds
Sold to Son Excellence M. Achille Fould on 12 November 1860 for 950 FF. Presented to Professor Heinrich Siegel
“Montre de souscription”.
“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.
George Graham lever escapement, double-dial astronomical watch, equation of time. Double face watch.
Experimental verge escapement
"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.
Hour and quarter repeater with verge escapement