Nixon 51-30 Chrono watch. Good looks, brains and brawn combined The 51-30 Chrono rates second-to-none. Handsome, easy-to-read 51 mm design that launched the oversized trend, with 3 CD textured subdials. 6-hand chrono, date window, 24-hour and seconds subdials, custom-molded hands with luminous fill. 3-link stainless steel or Acetate band with stainless steel double locking clasp with micro adjust. Imported.