Seiko was established in 1881 as a watch and clock repair shop in Ginza, Tokyo. Seiko has grown and diversified over the years but remains best known for its world-leading brands and expertise in fusing intricate watchmaking skill with elegant design. Seiko timepieces deliver precisely beautiful Japanese aesthetics, brought to life through total in-house manufacture. • Caliber Number: 8T63 • Movement Type: Quartz • Precision: plus or minus 15 seconds per month • Battery life: Approx. 3 years • Functions: 24-hour hand, Equipped with small seconds hand, Chronograph up to 60 minutes in 1/5 second increments, Date display • Case Size: Thickness:12.1mm, Diameter:41.5mm, Lug-to-lug:46.5mm • Crystal: Hardlex • Clasp: Three-fold clasp with push button release • Distance between lugs: 22 • Water Resistance: 10 bar • Weight: 133.0 • Screw case back