The Seiko 0903-8169 watch movement is a mechanical manually wound movement. It has a diameter of 21.9 mm and a height of 2.55 mm. With 18 jewels and 5 bridges, it consists of 130 parts. The movement has a power reserve of at least 44 hours. Equipped with a Gyromax® balance and a Spiromax® balance spring, it operates at a frequency of 28,800 vibrations per hour (4 Hz). The Patek Philippe Seal attests to its quality and reliability. It enables the accurate display of hours and minutes.