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EF-550D-7A

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  Features  

• 1/20-second chronograph
• Tachymeter
• A rotary dist at 3 o'clock to indicates the 24-hour
• Fast-moving retrograde dial at 6 o'clock
• 100-meter water resistance
• Stainless steel case and band
• Face design in the image of the engine cover

  Specifications  

- Case / bezel material: Stainless steel - Partial ion plated
- Solid Band - 100-meter water resistance
- Stainless Steel Band - 1/20-second stopwatch
- Double-lock, 1-press, 3-fold Clasp - Date display
- Screw Lock Back - Regular timekeeping: Analog
- Retrograde dial - Accuracy: ±20 seconds per month
- Mineral Glass - Approx. battery life: 2 years on SR927W
- Tachymeter - Size of case : 50.8×45.1×12.1mm
- Screw Lock Crown - Total weight : 181g

 

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