Purchased from an authorized dealer in September of 2013 and used for about a week. The 10-year warranty is unregistered. The CITIZEN AQ6100-56A Caliber No. 0100 Powered by: Eco-Drive (light-powered) Accuracy: ±1 second per year Operating time: Approximately 8 months when fully charged (power save activated) Weight: 119g Thickness: 9.7mm Case size: 39.0mm (width) Case material: Stainless steel Case surface treatment: Duratect α (light silver color) Band material/type: Stainless steel, three-fold clasp with push button release Band width: 19.0mm Adjustable band size: 136～204mm Glass: Dual spherical sapphire glass (Clarity Coating) Water resistance: 5 bar Magnetic resistance: Magnetic resistance class 1 Warranty card, extra links included