The ETA 255.431 is a quartz chronograph movement that was phased out in 2016. It features various functions including a 1/10s, 60s, 30min, and 12h chronograph, as well as 4 quartz controlled stepper motors. Additional functions include a sub second display, quickset date feature, and a Moon-Phase display. The movement also encompasses central hours, central minutes, central chronograph seconds, small seconds at 6:00, 1/10 second at 2:30, 30 minute chronograph counter at 9:30, and a date at 4:00. It was used during the approximate period of 2003.