The 51-30 Chrono. There's a reason they send tank watches into space. With superior functionality - 6 hand Japanese quartz movement, a second subdial, chrono and date - its wearer is never without the necessary earthly information. But with stainless steel-clad durability and unrivaled good looks, it's a timepiece that's rife with worldly good looks. Since there's plenty right here that can send you into orbit.