Citizen Eco-Drive x Analog ft. Marine Men Casual Formal Round 100m Water Resistant Watch AW1770-53L AW1770 AW-1770 Experience the perfect blend of sophistication and functionality with this stylish timepiece, powered by Eco-Drive technology to harness light as a sustainable energy source, and designed to keep up with your active lifestyle while maintaining a refined look, featuring a robust WR100 rating and convenient push-button buckle. Caliber Number / Movement J810 (solar Eco-Drive) Power Reserve / Accuracy Approximately 8 months when fully charged (+/-15 seconds per month) Crystal Sapphire crystal Luminous Luminous on hands and indexes Case & Band Material Stainless steel case with metal band (deployment clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 12.5 mm Diameter: 42.0 mm Other Specifications Citizen Eco-Drive x Analog ft. Marine Unidirectional rotating bezel Screw case back Date display Insufficient charge warning function Overcharge prevention function Regular timekeeping (analog display)