Jaccard, E.H. & Co. (Swiss 1850) Jacot, Charles Edouard (Swiss 1830-1860){ Jacot, Charles Patente Chinese Duplex} Jaeger, Edmon (Paris 1875-1920) Jaeger LeCoultre & Co. (Swiss Since 1833) Jamison (London 1786-1810) Janvier, Antide (Paris 1771-1834) Japy, Frederic & Sons (France, Swiss 1776) Jaquet, Pierre (Swiss 1750-1790) Jean Richard, Daniel (Swiss 1685-1740) Jean Richard, Edouard (Swiss 1900-1930) Jeannot, Paul (Entorno a 1890) Jefferys & Gildert (London 1790)
| Jossop, Josias (London 1780-1794) Jeubi, Josias (Paris entorno a 1575) Joly, Jacques (Paris 1625) Jovat (London 1690) Johnson Joseph (Liverpool 1805-1855) Jones, Henry (London 1665-1690) Jump, Joseph (England 1827-1850) Junod, Freres (Geneva 1850) Jurgensen, Urban & Jules (Copenhagen, Swiss 1745-1912) Just & Son (London 1790-1825) Juvet, Edouart (Swiss 1844-1880) Juvet, Leo (Swiss 1860-1890)
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