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Watch Movement - Automatic - Valjoux 7750

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Watch Movement - Automatic - Valjoux 7750
Name Valjoux 7750
Manufacturer Valjoux (Details)
Type Automatic
Jewel Count 25
Year(s) of Production 1974
Diameter (mm) 30.0
Height (mm) 7.9
Frequency (vph) 28,800
Power Reserve 44
Chronometer Yes
Hacking Yes
Date Yes
Hand Winding Yes
Quickset Yes



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History: Valjoux 7750 is a new clean-sheet design following on from the base calibre 7733. It is smaller than the 7733 (13 1/4 vs 14 lignes), with a higher beat rate (4 vs 2.5 Hz) and rocking pinion engagement replacing the horizontal clutch. The 7750 was introduced July of 1974 at the height of the Quartz crisis and initially sold well with a purported 100,000 pieces that year. There are three quality grades of the 7750: Elaboré, Top, and Chronomètre

This movement is also knows as the Tag Heuer 16.

Derived form the 7750: 7751 Full calendar with hands date, moon phase, 24-hours indication; 7753 Minute counter at the 3 instead of the 12, date change by pushers at the 10; 7754 GMT function with an additional 24-hour hand; 7757 Regatta countdown indication; 7758 Moon phase.

Info: 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: The company has been a part of ETA for a number of years and is a member of the Swatch Group.

Valjoux SA was founded in 1901 by the brothers John and Charles Reymond in Les Bioux and until 1929 operated under the name "Reymond Frères SA". The company specialized on chronograph movements. In 1910 it moved to a factory building maintained by the municipality of Les Bioux. The company's famous column wheel chronograph movement, Calibre 22, debuted in 1914 and lasted in production for sixty years. But it was larger than desirable for wrist watch use. The military, involved in the First World War, required reliable bracelet chronographs. Thereafter the 13-ligne chronograph Calibre 23 (diameter 29.33 mm, height 5.85 mm) was developed, which in 1916 came to the production stage and soon ticked in the wristwatches of very different manufacturers (for instance Audemars Piguet, Patek Philippe, Rolex, and Vacheron Constantin). The production lasted nearly sixty years, and until 1974 about 125,000 ebauche movements of this type were made.


Item created by: gdm on 2018-10-12 21:06:22. Last edited by gdm on 2018-10-16 22:10:24

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