This solar chronograph watch inherits the iconic designs and styles of the Speedtimer series from the 1960s-70s. Powered by Seiko’s solar Caliber V192, which has a 60-minute chronograph, a 24-hour sub-dial, and features a power reserveindicator that is displayed at the touch of a button. Movement Caliber Number: V192 Movement Type: Solar Precision: ±15 seconds per month Power reserve: Operating for approx. 6 months (when fully charged) Functions Overcharge prevention function 24-hour hand Equipped with small seconds hand Chronograph up to 60 minutes in 1/5 second increments Power reserve indicator Date display Case/Band Case Material: Stainless steel Case Size Thickness: 13.0mm Diameter: 41.4mm Lug-to-lug: 45.9mm Crystal Curved sapphire crystal Crystal Coating Anti-reflective coating on inner surface LumiBrite LumiBrite on hands and index(es) Clasp: Three-fold clasp with push button release Distance between lugs: 21mm Other Details Water Resistance: 10 bar Magnetic Resistance: 4,800 A/m Weight: 164.0g Features Tachymeter function Screw case back