Redefining the power of a sport watch with infinite possibilities. Introducing the Citizen Series 8 mechanical collection of modern timepieces for a modern world. The sporty designs with high-performance automatic movements make a powerful impression. Stand out in style with the refined, signature 831 mechanical watch that features a superior accuracy of -10 to +20 per day in a sleek, silver-tone stainless case and bracelet in both hairline and mirror finishes, a glossy blue dial with luminous hands and markers, and an anti-reflective sapphire crystal. This sleek, Citizen automatic men’s sport watch also features enhanced magnetic resistance to protect the movement against external magnetic fields, a 42-hour power reserve and water resistance to 100 meters. Caliber number 9051.