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Product Description:

Released: July 2011

Styled with an engine motif, the EF550PB-1AV is equipped with stacked sub-dials, which are strategically covered for enhanced legibility and a dynamic look. The sub-dial at the 3 o'clock position is designed to resemble a racing wheel. Armed with a 1/20th second retrograde chronograph, the second hand alternates between clockwise and counter clockwise motion during timed measurements.

  • 1/20-second chronograph
  • Tachymeter
  • A rotary disk at 3 o'clock to indicate 24-hour
  • Fast-moving retrograde dial at 6 o'clock
  • 100-meter water resistant
  • 100M Water Resistant
  • Retrograde 1/20 second chronograph
  • Measuring capacity: 59:59'59"
  • Measuring mode: Elapsed time
  • 12/24 Hour Formats
  • Tachymeter
  • Date Display
  • Mineral Glass
  • Screw Lock Crown
  • Screw Lock Back
  • Resin Band
  • Stainless Steel IP Case
  • Stainless Steel IP Bezel
  • Accuracy: ? 20 seconds per month
  • Battery: SR927W
  • Approx. battery life: 2 years
  • Module: 5147

Size of case / total weight
EF550PB 50.8 x 45.1 x 12.1mm / 100g

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