The Seiko 5H25-6C10 watch movement is a chronometer-certified version of the base ETA 2836-2 movement. It features simultaneous indication of two individual time-zones, with the centre hands indicating hours and minutes for the first time-zone (T1). The centre hour hand for T1 can be set forward or backward hour by hour through two pushers. At 3 o'clock, there is a subsidiary dial for T2, displaying hours and minutes as well as a day and night indicator. A subsidiary second dial is located at 9 o'clock. The movement also includes a date window at 6 o'clock, which is synchronized with the centre hands for T1. The date can automatically rotate forward or backward if the hour hand for T1 is set over midnight. Additionally, the movement has a quick date setting device, a fine timing device, and a stop-second function.