Seiko Prospex S23627

Caliber 7C46
  Accuracy: +/- 15 seconds per month (between 5°C and 35°C)

Specifications
  Titanium inner case with gold color coating (S23626)
  Zirconia ceramic outer protector (S23626)
  Titanium inner case with black hard-coating (S23627)
  Cermet outer protector (S23627)
  Sapphire crystal
  Screw-down crown
  Diameter: 49.4 mm, Thickness: 15.3 mm
  Water resistance: 1,000m saturation diver’s
  Magnetic resistance: 4,800 A/m
  Silicone strap