The Seiko Y480-6730 is an electrical Swiss wrist-watch movement introduced from 1960 to 1961. It is equipped with an electromechanically controlled balance motor and features a sweep second function. The early samples of this movement lack an excenter regulator, while the standard mounting frame measures Dm=Do=30.2mm. It is an electronic movement that offers central hours, central minutes, and central sweeping seconds.
The Seiko Y480-6730 features the following functions:
Central hours, central minutes, central sweeping seconds