Mido Chronograph Valjoux

In 1974, Mido released a chronograph equipped with one of the best-known movements in the world of watchmaking: the Valjoux 7750 movement.  This movement was hugely successful at the time thanks to its reliability, accuracy, and ease of manufacture.  

The 7750 was quite a large calibre, with a diameter of 30 mm. It measured 7.90 mm in height and oscillated at a frequency of 28,800 vibrations per hour, which allowed for a high degree of accuracy when using the chronograph function. 

 

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The movement offered the following functions:

  •  Centre hours and minutes
  • Small seconds in the counter at 9 o'clock
  • Centre chronograph seconds
  • 30-minute counter at 12 o'clock
  • 12-hour counter at 6 o'clock
  • Day and date window at 3 o'clock

 

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Wrist

Technical specs of the Valjoux ETA 7750:

 

  • Height: 7.90 mm
  • Diameter: 30.00 mm
  • Lignes: 13 ¼ ‴
  • Cam chronograph mechanism
  • Automatic winding module with ball bearings
  • Functions: Hours, minutes, small seconds, chronograph, date and day
  • 2 push-buttons 
  • ETACHRON index-assembly and index corrector
  • Frequency: 28,800 vib/h or 4 Hz
  • 25 jewels
  • Other device: stop seconds

 

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