English: Musée International d'Horlogerie, La Chaux-De-Fonds, Switzerland. On the left is one of the first quartz clocks, which superseded mechanical clocks as precision time standards in the 1930s. On the right is a precision regulator clock made by German firm Clemens Riefler, which were used as time standards worldwide in the early 1900s.
Français : Musée International d'Horlogerie, La Chaux-De-Fonds, Suisse.
2006-09-27T23:53:08Z Rama 1429x2191 (418039 Bytes) {{fr|Musée International d'Horlogerie, La Chaux-De-Fonds, Suisse}} {{en|Musée International d'Horlogerie, La Chaux-De-Fonds, Switzerland}} Work by [[User:Rama|Rama]] {{self2|CeCILL|Cc-by-sa-2.0-fr}} [[Category:Musée int
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