Caliber 7750: X-ray of a legend

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Caliber 7750: X-ray of a legend

Postby koimaster » August 17th 2017, 9:55am

These are generally the first figures that one learns during his watch classes: 7750 , to pronounce 77-50. The reference to this chronograph is so widespread that it becomes familiar, like a distant cousin never met, but of which one hears so much talk that one has the impression of knowing it!

In truth, the history of the 7750 caliber is so long and rich that it is difficult to grasp in one piece. Starting with its name: ETA 7750 or Valjoux 7750 ?

Historical Resistance

Historically, both names are correct. Ebauches SA , former name of Valjoux, joined a larger company in 1931, ASUAG. The latter will be merged with the SMH (Swiss Society of Microelectronics and Watchmaking SA) and the renamed The Swatch Group in 1998. In summary, Valjoux is a war treasure of the group.

The 7750 is certainly its most well known caliber , because one of the most diffused and most reliable. He is also credited with the so-called " tractor " watchmaker , which, like the Rolex , is characterized by basic movements but with exceptional longevity . The 7750 had been designed with this in mind, bringing together only 240 components when it was created in 1974. It was 10% less than its competitor El Primero . To reduce its cost, ETA has also reduced the frequency, with two versions at 21,600 and 28,800 vibrations per hour , when El Primero was only available for 36,000 alternations .

Valjoux will go even further in the economy, proposing three years after its creation the 7755 (without indication of the day) and 7765 , manual version of the 7755. The quartz crisis, which will take many calibres, will spare the 7750 Become inescapable. ... ne-legende

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Re: Caliber 7750: X-ray of a legend

Postby PiningforElgin » August 18th 2017, 7:59am

koimaster wrote:These are generally the first figures that one learns during his watch classes: 7750 , to pronounce 77-50.

Good to know. I used to say "Seven Seven Fifty" - close enough but incorrect :D
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Re: Caliber 7750: X-ray of a legend

Postby foghorn » August 18th 2017, 8:04am

I thought it was Seven Seventy Five-naught

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Re: Caliber 7750: X-ray of a legend

Postby TemerityB » August 18th 2017, 2:34pm

A great workhorse movement; people who rank on it don't wanna pay the nut for it. Yeah, I said it.
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