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Return To ShopThe Seiko V401-5050 watch movement, introduced around 1975, features a sweep second hand and a hack feature. The movement includes an electromechanically controlled balance motor with a pointed balance staff that is supported by white jewels. The amplitude stabilization is enhanced by the presence of a diode parallel to the inductor on the balance, which also aids in preventing sparks at the contact point and improving durability.
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