The ETA 255.487 is a quartz chronograph movement with a date function. It features 4 quartz controlled stepper motors and supports various timekeeping functions including hours, minutes, small seconds, and a central chronograph seconds hand. It also includes a sub-second counter and a 30-minute counter. The movement is capable of measuring time with a high precision of 1/10 seconds. Additionally, it has a quickset feature for adjusting the date. The ETA 255.487 movement was phased out around 2003. A pictured dial side is available for reference.