Movement: Mechanical-quartz movement (Seiko VK64 caliber) Mechanical-quartz movement: The chronograph hands move smoothly, like a mechanical chronograph movement, rather than jumping once per second like a typical quartz movement. Case: Gold-plated 316L stainless steel (screw-down crown and pushers) Bracelet: Gold-plated 304 stainless steel Size: Case diameter 37.8 mm, case thickness 11.9 mm (13.1 mm including crystal) Water resistance: 50M Functions: Chronograph (60-minute counter at 9 o'clock), 24-hour counter at 3 o'clock Limited Edition: 100 pieces Assembled in Japan