Seiko 1400A

The 1400A is an automatic mechanical movement developed by the Japanese manufacturer Seiko. It serves as a core component in various timepieces, embodying Seiko's approach to functional watchmaking. As an automatic caliber, the 1400A self-winds through the natural motion of the wearer's wrist. This eliminates the need for manual winding during regular use, providing convenience and continuous operation without external power sources or battery changes. The movement incorporates 12 jewels, which are synthetic rubies strategically placed at points of high friction. These jewels reduce wear on metal components, contributing to the movement's durability and consistent performance over time. Operating at a frequency of 18,000 vibrations per hour (vph), or 2.5 Hz, the 1400A dictates the motion of the seconds hand. This beat rate translates to a seconds hand that completes five distinct steps per second, offering a smooth yet discernible sweep across the dial. This frequency is characteristic of robust, reliable timekeeping. With a diameter of 25.6 mm, the physical size of the 1400A influences the design and dimensions of the watches it powers. This measurement dictates the minimum internal space required within a watch case, making the 1400A suitable for a diverse array of watch sizes, from more compact designs to standard men's timepieces. For the wearer, the 1400A offers the practical benefits of a self-sufficient, mechanically driven timekeeping instrument designed for everyday reliability.

Specifications

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