A compilation of references, information and expertise. Discover key dates, legendary timepieces, a glossary of watchmaking terms, museums, and the watchmakers who helped shape the history of time measurement.
Swiss chronometer-maker. Established in Le Locle, Switzerland, in 1824, Grandjean Henri et Compagnie S.A. was a specialist manufacturer of pocket watches with grande and petite sonnerie, and marine chronometers. Henri Grandjean was a founder of the Neuchâtel Observatory in...