Citizen Eco-Drive x Analog ft. Endicott Men Casual Formal Tonneau 100m Water Resistant Watch AW1720-51E AW1720 AW-1720 Experience the perfect blend of style and innovation with this sleek men's timepiece, featuring a silver-tone stainless steel case, black 3-hand dial, and sustainable Eco-Drive technology, perfect for the modern gentleman seeking a sophisticated accessory that stands the test of time. 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: 10.6 mm Diameter: 45.8 mm Other Specifications Citizen Eco-Drive x Analog ft. Endicott Screw case back Date display Insufficient charge warning function Overcharge prevention function Regular timekeeping (analog display)