The Seiko Y771-503A is a mechanical watch movement that features an Adjustable Stud Holder, providing greater precision in regulating the timekeeping. It incorporates Shock Protection, ensuring durability and minimizing potential damage from abrupt movements or impacts. The movement includes Sweep Seconds functionality, allowing for a smooth continuous motion of the seconds hand. It also incorporates a Calendar feature, displaying the date. The beat rate of the movement is 21600 vph, indicating the frequency at which it oscillates.