The Eterna 1407U watch movement features a ratchet on the dial side, as well as a crown mechanism with a rocker bar. It incorporates shock protection through elastical spiral-shaped balance spokes. Notably, the train and hand gear are driven separately by the barrel. This movement offers various functions including manual wind, sweep second, date, sweep seconds, jeweled lever, and calendar. The Eterna 1407U movement was commonly employed around the period of 1980.