The Mido 12512-1 is a mechanical watch movement that was introduced in 1979. It is an open face calibre with a Breguet hairspring, which contributes to its accurate timekeeping capabilities. The movement features adjustment screws on the balance spokes, allowing for precise regulation. The Mido 12512-1 movement offers functions such as stem winding and setting, as well as a sub-second display. Its period of usage spans from 1979 onwards.