Prospex Speedtimer Mechanical Chronograph

• Inspired by Seiko’s first precision chronographs, developed for international sporting competitions in 1964, and its 1969 introduction of the world’s first automatic chronograph

• Automatic with manual winding capability

• 28,800 vibrations per hour

• Power reserve: approximately 45 hours

• 34 jewels

• Chronograph measures up to 30 minutes of elapsed time in 1/8-second increments

• Column wheel and vertical clutch mechanism allows for smooth, stutter-free movement of the chronograph hand while providing longer wear and efficiency, and maintaining the power reserve better during chronograph operation

• Charcoal gray dial

• Beige LumiBrite hands and markers

• Dual curved sapphire crystal with anti-reflective coating on the inner surface

• Screwdown see-through caseback

• Case dimensions: Thickness – TKmm; Diameter – 42.5mm; Length – TKmm

• Stainless steel case and bracelet with super-hard coating

• Tri-fold push button release clasp

• Water resistant to 10 bar, 100 meters (330 feet)

• Caliber 8R46