{"id":550,"date":"2022-08-25T12:19:24","date_gmt":"2022-08-25T10:19:24","guid":{"rendered":"https:\/\/henrigrandjean.genevaworld.ch\/henri-grandjean-1803-1879\/"},"modified":"2022-09-19T08:55:36","modified_gmt":"2022-09-19T06:55:36","slug":"henri-grandjean-1803-1879-en","status":"publish","type":"page","link":"https:\/\/henrigrandjean.genevaworld.ch\/en\/henri-grandjean-1803-1879-en\/","title":{"rendered":"Henri Grandjean (1803-1879)"},"content":{"rendered":"<section class=\"l-section wpb_row height_medium\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-12 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Henri Grandjean, horloger b\u00e2tisseur, bienfaiteur<\/h2>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-8 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column us_custom_ff837323\"><div class=\"wpb_wrapper\"><p>L\u2019horloger Henri Grandjean est d\u2019abord r\u00e9put\u00e9 pour sa ma\u00eetrise des complications horlog\u00e8res, son sens de la simplification, de la bel-ouvrage et du culte de la pr\u00e9cision. Ses \u0153uvres, qui se distinguent dans les concours de chronom\u00e9trie organis\u00e9s par les Observatoires, sont r\u00e9guli\u00e8rement prim\u00e9es dans les expositions universelles internationales (Londres, Paris, Berne, Santiago et Philadelphie). A sa parfaite connaissance de la science chronom\u00e9trique s\u2019ajoute une deuxi\u00e8me comp\u00e9tence, celle d\u2019\u00eatre en mesure de d\u00e9fendre commercialement avec succ\u00e8s ses cr\u00e9ations<\/p>\n<p>Ses cr\u00e9ations dont la bienfacture force encore aujourd\u2019hui l\u2019admiration, des chronom\u00e8tres de marine et des montres de poche, sont pr\u00e9sentes dans les mus\u00e9es horlogers dont le Ch\u00e2teau des Monts, le <a href=\"http:\/\/www.mhl-monts.ch\/fr\/index.php\">Mus\u00e9e d\u2019Horlogerie du Locle<\/a>, qui en d\u00e9tient quelques pi\u00e8ces parmi les plus exceptionnelles. Un mus\u00e9e dot\u00e9 \u00e9galement d\u2019un \u00abFonds Grandjean\u00bb, ce qui lui conf\u00e8re une dimension d\u00e9passant la simple fabrication de montres. Sa production, sous Grandjean &amp; Cie, est estim\u00e9e entre 150 \u00e0 200 pi\u00e8ces. Les principales maisons de ventes aux ench\u00e8res ont toutes vu passer sous leurs marteaux, durant les trente derni\u00e8res ann\u00e9es, une ou plusieurs r\u00e9f\u00e9rences sign\u00e9es de ce ma\u00eetre horloger. Le c\u00e9l\u00e8bre expert horloger <a href=\"https:\/\/swiss-watch-passport.ch\/dr-helmut-crott-les-encheres-lui-doivent-leurs-centaines-de-millions\/\">Dr. Helmut Crott<\/a>, par ailleurs collectionneur v\u00e9n\u00e9r\u00e9 et p\u00e8re des toutes premi\u00e8res ventes aux ench\u00e8res horlog\u00e8res, en poss\u00e8de au moins une, comme bon nombre de ses pairs.<\/p>\n<\/div><\/div><div class=\"w-separator size_large with_line width_default thick_1 style_solid color_border align_center\"><div class=\"w-separator-h\"><\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-4 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"w-image align_none\"><div class=\"w-image-h\"><img decoding=\"async\" width=\"547\" height=\"578\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean_01.jpg\" class=\"attachment-full size-full lazyload\" alt=\"\" data-srcset=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean_01.jpg 547w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean_01-284x300.jpg 284w\" data-sizes=\"auto, (max-width: 547px) 100vw, 547px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 547px; --smush-placeholder-aspect-ratio: 547\/578;\" \/><\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"w-btn-wrapper align_none\"><a class=\"w-btn us-btn-style_1\" title=\"David-Henri Grandjean (1772-1846)\" href=\"https:\/\/henrigrandjean.genevaworld.ch\/en\/david-henri-grandjean-en\/\"><span class=\"w-btn-label\">David-Henri Grandjean (1772-1846)<\/span><\/a><\/div><div class=\"w-btn-wrapper align_none\"><a class=\"w-btn us-btn-style_1\" title=\"Familles Grandjean\" href=\"https:\/\/henrigrandjean.genevaworld.ch\/en\/familles-grandjean-cotraitants-en\/\"><span class=\"w-btn-label\">Les Grandjean de la cotraitance<\/span><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-8 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column us_custom_ff837323\"><div class=\"wpb_wrapper\"><p>Entr\u00e9 en franc-ma\u00e7onnerie vers l\u2019\u00e2ge de 29 ans, Henri Grandjean s\u2019implique dans la vie citoyenne de sa r\u00e9gion au point de risquer sa vie dans la R\u00e9volution de 1848, la r\u00e9sistance des hauts neuch\u00e2telois \u00e0 la monarchie prussienne. Son engagement lui vaut d\u2019entrer au Grand Conseil du Locle et d\u2019effectuer deux l\u00e9gislatures au Conseil national. Abonn\u00e9 \u00e0 de nombreuses \u0153uvres caritatives et culturelles, Henri Grandjean sera \u00e9galement, sur le plan de l\u2019urbanisme local, \u00e0 l\u2019origine du quartier du Progr\u00e8s (ou Quartier-Neuf), destin\u00e9 \u00e0 permettre aux ouvriers d\u2019acc\u00e9der \u00e0 la propri\u00e9t\u00e9. Un quartier \u00e0 qui la ville du Locle doit d\u2019avoir \u00e9t\u00e9 reconnue, en m\u00eame temps que La Chaux-de-Fonds, au Patrimoine Mondial de l\u2019Unesco (urbanisme horloger).<\/p>\n<blockquote>\n<p>Henri Grandjean construit l\u2019Observatoire de Neuch\u00e2tel. C\u2019est sous son impulsion et gr\u00e2ce \u00e0 sa d\u00e9termination que l\u2019Ecole d\u2019Horlogerie du Locle voit le jour en 1868<\/p>\n<\/blockquote>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-4 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"w-image align_none\"><div class=\"w-image-h\"><img decoding=\"async\" width=\"800\" height=\"449\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/observatoire_438.jpg\" class=\"attachment-full size-full lazyload\" alt=\"\" data-srcset=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/observatoire_438.jpg 800w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/observatoire_438-300x168.jpg 300w\" data-sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 800px; --smush-placeholder-aspect-ratio: 800\/449;\" \/><\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"w-image align_none\"><div class=\"w-image-h\"><img decoding=\"async\" width=\"1540\" height=\"1028\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2022\/09\/Henri-Grandjean-Ancienne-Ecole-Horlogerie-Le-Locle_1968-1890.jpeg\" class=\"attachment-full size-full lazyload\" alt=\"\" data-srcset=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2022\/09\/Henri-Grandjean-Ancienne-Ecole-Horlogerie-Le-Locle_1968-1890.jpeg 1540w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2022\/09\/Henri-Grandjean-Ancienne-Ecole-Horlogerie-Le-Locle_1968-1890-300x200.jpeg 300w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2022\/09\/Henri-Grandjean-Ancienne-Ecole-Horlogerie-Le-Locle_1968-1890-1024x684.jpeg 1024w\" data-sizes=\"auto, (max-width: 1540px) 100vw, 1540px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1540px; --smush-placeholder-aspect-ratio: 1540\/1028;\" \/><\/div><\/div><div class=\"w-separator size_small\"><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Am\u00e9rique du Sud \u00e0 l\u2019\u00e2ge de 21 ans<\/h2>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"wpb_text_column us_custom_a4e370b8\"><div class=\"wpb_wrapper\"><p style=\"text-align: left;\">N\u00e9 le 14 d\u00e9cembre 1803 au Locle, Henri Grandjean est le fils de l\u2019horloger David Henri Grandjean (La Sagne) et de Suzanne Marie Lenoir (Ch\u00e2teau d\u2019\u0152x). Il commence son apprentissage \u00e0 l\u2019\u00e2ge de 12 ans \u00e0 la maison dite de la Maltourn\u00e9e, situ\u00e9e au Locle, sur les Monts. En 1824, \u00e0 21 ans, il obtient un passeport pour le Br\u00e9sil o\u00f9 il d\u00e9veloppe et agrandit les comptoirs horlogers cr\u00e9\u00e9s par son p\u00e8re. Il parcourt plusieurs pays d\u2019Am\u00e9rique du sud.<\/p>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Chronom\u00e9trie de pr\u00e9cision, esprit novateur<\/h2>\n<\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-8 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column us_custom_95d492f5\"><div class=\"wpb_wrapper\"><p>Peu pratiqu\u00e9e en Suisse \u00e0 l\u2019\u00e9poque, l\u2019horlogerie de pr\u00e9cision demeure sa vision. Il s\u2019y consacre d\u00e8s son retour au Locle en 1830. Il entreprend avec l\u2019aide de son p\u00e8re la construction de son chronom\u00e8tre de marine N\u00b01, s\u2019inspirant, non sans y apporter quelques modifications et am\u00e9liorations, des meilleurs mod\u00e8les de son temps, les chronom\u00e8tres anglais. Ainsi \u00e9quipe-t-il sa pi\u00e8ce de deux ressorts dans le barillet, d\u2019un balancier non coup\u00e9 avec lames bim\u00e9talliques \u00e0 l\u2019int\u00e9rieur, agissant sur des masses compensatrices. Plus grandes que ses semblables anglaises, la pi\u00e8ce sera livr\u00e9e au Br\u00e9sil avant de revenir, bien des ann\u00e9es plus tard et au terme de rocambolesques aventures, entre les mains de son cr\u00e9ateur.<\/p>\n<p>Esprit novateur, Henri Grandjean exp\u00e9rimente par la suite divers proc\u00e9d\u00e9s: balanciers \u00e0 vis ou \u00e0 masse, \u00e9chappements \u00e0 d\u00e9tente pivot\u00e9e ou \u00e0 d\u00e9tente-ressort, spiraux circulaires ou sph\u00e9riques. Si aucun de ces syst\u00e8mes ne lui para\u00eet en soi meilleur qu\u2019un autre, il insiste en revanche sur les courbes terminales du spiral, telles que vient de les calculer le math\u00e9maticien <a href=\"https:\/\/fr.wikipedia.org\/wiki\/\u00c9douard_Phillips\">Edouard Phillips<\/a> (1821-1889).<\/p>\n<p>Bien avant le physicien prix Nobel <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Charles_\u00c9douard_Guillaume\">Charles-Edouard Guillaume<\/a> (1861-1938), il envisage d\u2019utiliser un alliage de nickel pour les spiraux. Travaillant sur des calibres diff\u00e9rents, Henri Grandjean d\u00e9montre que la taille d\u2019un mouvement ne d\u00e9termine pas sa pr\u00e9cision. Si son calibre pr\u00e9f\u00e9r\u00e9 est un 56 lignes \u00e0 deux platines, disposant d\u2019une r\u00e9serve de marche de cinquante-six heures, il r\u00e9alise aussi des montres marines de petite dimension, jusqu\u2019\u00e0 26 lignes. Il s\u2019illustre par son sens de la simplification technique et par l\u2019indiscutable niveau \u00e9lev\u00e9 de ses finitions.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-4 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"w-image align_none\"><div class=\"w-image-h\"><img decoding=\"async\" width=\"751\" height=\"600\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-19eme-siecle-certificat-observatoire-neuchatel-1.jpg\" class=\"attachment-full size-full lazyload\" alt=\"\" data-srcset=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-19eme-siecle-certificat-observatoire-neuchatel-1.jpg 751w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-19eme-siecle-certificat-observatoire-neuchatel-1-300x240.jpg 300w\" data-sizes=\"auto, (max-width: 751px) 100vw, 751px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 751px; --smush-placeholder-aspect-ratio: 751\/600;\" \/><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Henri Grandjean Gen\u00e8ve (Le Locle)<\/h2>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-8 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column us_custom_ff837323\"><div class=\"wpb_wrapper\"><p>Au terme d\u2019une longue maladie, Henri Grandjean d\u00e9c\u00e8de sans laisser d\u2019h\u00e9ritier. Sa fortune, ses immeubles ainsi que son entreprise sont donc transmis \u00e0 sa ni\u00e8ce Oline Rossel, n\u00e9e Grandjean, la fille de son fr\u00e8re d\u00e9c\u00e9d\u00e9 tr\u00e8s t\u00f4t, qui lui avait \u00e9t\u00e9 confi\u00e9e. M\u00e8re de cinq enfants, puis d\u2019Auguste Rossel, un ancien employ\u00e9 de Henri Grandjean &amp; Cie, Oline Rossel perp\u00e9tue l\u2019\u0153uvre l\u2019\u0153uvre de son p\u00e8re adoptif, s\u2019associant par la suite \u00e0 l\u2019un de ses quatre fils, Gustave.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-160 alignleft lazyload\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2022\/07\/bildmarke_paulcattin.jpg\" alt=\"\" width=\"200\" height=\"75\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 200px; --smush-placeholder-aspect-ratio: 200\/75;\" \/>Il est probable que l\u2019h\u00e9riti\u00e8re Oline qui disposait du droit d\u2019utlisation de la raison sociale &#8220;<em>Successeurs Henri Grandjean&#8221;<\/em>, ait ensuite c\u00e9d\u00e9 le nom que l&#8217;on retrouve inscrit \u00e0 Gen\u00e8ve le 10 novembre 1923 \u00e0 Gen\u00e8ve (Plainpalais) sous la raison sociale &#8220;<em>SA de la Fabrique des montres Henry Grandjean &amp; Cie<\/em>.&#8221; Historiquement, la signature &#8220;<em>Henri Grandjean&#8221;<\/em>\u00a0peut d\u00e8s lors \u00eatre associ\u00e9e \u00e0 Le Locle et \u00e0 Gen\u00e8ve<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-4 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"w-image align_none\"><div class=\"w-image-h\"><img decoding=\"async\" width=\"2560\" height=\"1926\" data-src=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-geneve-montre-poche_LR-scaled.jpg\" class=\"attachment-full size-full lazyload\" alt=\"\" data-srcset=\"https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-geneve-montre-poche_LR-scaled.jpg 2560w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-geneve-montre-poche_LR-300x226.jpg 300w, https:\/\/henrigrandjean.genevaworld.ch\/wp-content\/uploads\/2021\/08\/henri-grandjean-geneve-montre-poche_LR-1024x770.jpg 1024w\" data-sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 2560px; --smush-placeholder-aspect-ratio: 2560\/1926;\" \/><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"l-section wpb_row height_medium\"><div class=\"l-section-overlay\" style=\"background:#F1EEE9\"><\/div><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-4 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><\/div><\/div><\/div><div class=\"vc_col-sm-8 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-12 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><blockquote>\n<p>Dans le canton de Neuch\u00e2tel, en.Suisse, il y a le petit village de la C\u00f4te-aux-F\u00e9es, berceau des Piaget, des Grandjean, il y a le Val de Travers et la Vall\u00e9e de La Sagne d&#8217;o\u00f9 sont issus tant d&#8217;autres illustres noms de l&#8217;histoire horlog\u00e8re: Abraham Louis Breguet, Louis Moinet, Ferdinand Berthoud, Pierre Jaquet-Droz.<\/p>\n<\/blockquote>\n<\/div><\/div><div class=\"wpb_text_column us_custom_0a0350d4 has_text_color\"><div class=\"wpb_wrapper\"><p>Jo\u00ebl A. Grandjean<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"Henri Grandjean, horloger b\u00e2tisseur, bienfaiteur L\u2019horloger Henri Grandjean est d\u2019abord r\u00e9put\u00e9 pour sa ma\u00eetrise des complications horlog\u00e8res, son sens de la simplification, de la bel-ouvrage et du culte de la pr\u00e9cision. Ses \u0153uvres, qui se distinguent dans les concours de chronom\u00e9trie organis\u00e9s par les Observatoires, sont r\u00e9guli\u00e8rement prim\u00e9es dans les expositions universelles internationales (Londres, Paris,...","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-550","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Henri Grandjean (1803-1879) | Henri Grandjean, Horloger B\u00e2tisseur<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Henri Grandjean (1803-1879) | Henri Grandjean, Horloger 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