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• 14:14, 17 March 2023 Sfoskett talk contribs created page Chronology of Watchmaking (Created page with "* 1766 - Antide Janvier, born in St-Claude, composes at the age of fourteen a celestial sphere received with praise by the Academy of Sciences of Besançon. * 1768 - F. Berthoud submits his new theory of balance spring isochronism. * 1770 - J.-Ant. Lépine presented Louis XV with a so-called astronomical repeater, with equation and perpetual calendar. * 1773 - Experiments by F. Berthoud on the effect of temperature variations. * 1775 (...")