The ETA F03.412-DT3 is a reliable Swiss-made quartz movement calibre widely used in wristwatches requiring central hour, minute and second hands, plus a date display. It belongs to ETA’s Trendline F03 family, known for robustness, good battery life and stable performance. 

Technical Specifications

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  Movement Type: Quartz (battery-powered)

  
  


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  Calibre Designation: ETA F03.412-DT3 (variation of F03.412)

  
  


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  Ligne Size: 7¾’’’ (approx. 17.20 mm diameter)

  
  


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  Height (Thickness): ~2.50 mm 

  
  


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  Functions:

  
  
  
  
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    Hours, minutes, seconds (central sweep)

    
    
  
  
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    Date window (at 3 o’clock)

    
    
  
  
  
  


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  Jewels: 3 Ruby bearings reduce friction for long-term reliability

  
  


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  Features:

  
  


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    Stop-second / Stop-motor function — stops the seconds hand for accurate time setting

    
    
  
  
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    End-of-Life (EOL) indicator — alerts impending battery exhaustion 

    
    
  
  
  
  


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    HeavyDrive — enhances torque to drive larger or heavier hands without loss of accuracy 

    
    
  
  
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    PreciDrive — high-precision timekeeping capability significantly better than standard quartz, often approaching chronometer-grade accuracy 

    
    
  
  
  
  


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  Battery Life:

  
  
  
  
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    ~34 months with a 20 mAh button cell

    
    
  
  
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    ~48 months with a higher capacity (28 mAh) battery