The Seiko Y150-5M10 watch movement, which was in use around 1975, incorporates a pointed balance staff supported by white jewels. According to the manufacturer, a diode parallel to the inductor on the balance contributes to stabilizing the amplitude and enhancing durability by preventing sparks during contact. In terms of functionality, the movement features an electromechanically controlled balance motor, sweep second, and a date that can be set within a +/-24-hour range. Additionally, it includes dual time 12-hour functionality with a quickset option by reverse setting, and a hack feature.