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ETA Mechanical movements Caliber Product Line Winding Diameter Height Jewels Frequency Running time VPH Hz; 2671 [1] Mecaline automatic 17.2 4.8 25 28800 4 38 2678 [2] Mecaline automatic 17.2 5.35 25 28800 4 38 2000-1 [3] Mecaline Specialities automatic 19.4 3.6 20 28800 4 40 2681 [4] Mecaline automatic 19.4 4.8 25 28800 4 38 2094 [5]
ETA SA Manufacture Horlogère Suisse (ETA SA Swiss Watch Manufacturer) designs and manufactures quartz watches and both hand-wound and automatic-winding mechanical ébauches and movements. Commonly referred to as ETA , the company is headquartered in Grenchen , Switzerland , and is a wholly owned subsidiary of The Swatch Group .
Video of the rotor turning in an automatic wristwatch having a glass back, when the watch is moved by hand. An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. [1]
The Buren (now Hamilton/Buren) Micro-rotor was the first patented automatic wristwatch movement to eliminate the sizable external oscillating weight inherent to most automatic winding watches. Instead, it utilized a much smaller weight that was entirely integrated into the chassis of the movement.
Sellita (Sellita Watch Co. SA) is a Swiss manufacturer of mechanical watch movements based in La Chaux-de-Fonds in the canton of Neuchâtel.Founded in 1950, Sellita was one of ETA's major outsourced assembly partners for their movements until 2003.
ETA/Valjoux 7750 (photo 2009) Chart of historic Valjoux movements Valjoux (for Vallée de Joux, "Joux Valley") is a Swiss manufacturer of mechanical watch movements.It is known primarily for chronograph ébauche movements that are used in a number of mid- to high-range mechanical watches.
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