Seiko Epson YM04A

Battery-powered quartz chronograph with central 1/5-second chronograph hand, small running seconds at 9 o’clock, 60-minute chronograph counter at 6 o’clock, 24-hour hand at 3 o’clock and a big date at 12 o’clock. Casing diameter is 27.0 mm and height including battery is 4.93 mm. Uses SR927SW, with approximately five years of battery life under the specified chronograph duty cycle and ±20 seconds per month.