Ferdinand Berthoud: Essai sur L'Horlogerie，一套兩冊皮革封套法文書，巴黎， 1763
Ferdinand Berthoud: Essai sur L'Horlogerie, 2 Volumes, Paris, 1763
According to a handwritten entry dating from 1829, the two high-value leather-bound volumes of Ferdinand Berthoud’s famous work come from the property of Louis Bourbon , presumably Louis VI. Henri Joseph de Bourbon, Prince de Condé, member of the French royal family and last Duke of Bourbon. Berthoud‘s work is an encyclopedia of the horological knowledge of his time, collected on more than 900 pages. Most striking are the 48 tables illustrating the skilled craftsmanship of Berthoud’s designs: instruments and equation discs, gridiron pendulums and their heavy gimbals, different types of escapements.
Louis (1756-1830) was the only son of Louis V Joseph, Prince de Condé and his first wife Princess Charlotte de Rohan, "Mademoiselle de Soubise". On April 24, 1770 he married Princess Bathilde, the daughter of Duke Louis Philippe I d’Orleans in Versailles; the couple separated in 1780.