mechanical watches
81Geschichte der Zeitmessgeräte — Die Geschichte der Zeitmessgeräte lässt sich bis vor 6000 Jahren zurückverfolgen, als die Sumerer auf Tontafeln von Sonnenuhren berichteten. Von dieser Erfindung, die als eine der größten der Menschheit bezeichnet werden kann, existierte in einer …
82Ceramic materials — Ceramic Si3N4 bearing parts Ceramic materials are inorganic, non metallic materials and things made from them. They may be crystalline or partly crystalline. They are formed by the action of heat and subsequent cooling.[1] Clay was one of the… …
83Spring Drive — The Spring Drive is a novel watch movement that was developed by Seiko Epson [ [http://www.epson.co.jp/e/company/milestones 35 spring drive.htm Milestone Seiko/Credor Spring Drive] Milestone Products, Seiko Epson] through collaboration with Seiko …
84Maria-sama ga Miteru — Cover of the first light novel, with art by Reine Hibiki マリア様がみてる Genre Class S …
85Balance spring — A balance spring, or hairspring, is a fine spiral or helical spring used in mechanical watches, marine chronometers, and other timekeeping mechanisms to control the rate of vibration of the balance wheel. A balance spring usually has a regulator… …
86National Watch and Clock Museum — The National Watch and Clock Museum (USA) (NWCM), located in Columbia, Pennsylvania, is one of a very few museums in the United States dedicated solely to horology, which is the history, science and art of timekeeping and timekeepers. Like its… …
87Titoni — LTD. is a Swiss watch company which was founded in 1919 by Fritz Schluep in the city of Grenchen. Nowadays the company is still in family property and employs around 50 collaborators. Since its foundation, the watches are sold mainly in the Asian …
88Musical box — A musical box (UK usage; music box in US English) is a 19th century automatic musical instrument that produces sounds by the use of a set of pins placed on a revolving cylinder or disc so as to strike the tuned teeth of a steel comb. They were… …
89Marine chronometer — Breguet twin barrel box chronometer. Classification Clock Industry Transportation …
90List of Sonic Underground characters — This article is for fictional characters from the Sonic the Hedgehog franchise that appear exclusively in the animated series Sonic Underground .For minor characters in other continuities, see Other characters in Sonic the Hedgehog.Agent NAgent N …
