ETA SA C15-111

The ETA C15-111 is an automatic movement manufactured by ETA SA in Switzerland. Derived from the Sistem51 platform, it measures 33mm in diameter and 5.77mm thick, operates at 21,600 vibrations per hour, and delivers a 72-hour power reserve. The movement features Nivachoc shock protection and uses synthetic escapement components with a metal balance spring. Unlike most ETA movements, it is designed as a non-serviceable unit—worn movements are typically replaced rather than repaired during service. It powers the Tissot Everytime Swissmatic and Gentleman Swissmatic.