Laco Laco 31

The Laco 31 is an automatic movement based on the Miyota 8315, a workhorse caliber from Japan's Miyota division. It measures 26mm in diameter and 5.67mm thick, operates at 21,600 vph, and contains 21 jewels. The movement features hacking and hand-winding functions, allowing users to stop the seconds hand for precise time setting and manually wind the mainspring. It remains in production and is used in Laco's entry-level sport and field watches.