ETA SA C07.661

The ETA C07.661 is an automatic movement from ETA SA and part of the C07 family. Based on the C07.611, it features the Powermatic 80 platform with a true caller GMT complication, allowing independent adjustment of the local hour hand while a dedicated GMT hand tracks home time. The movement provides an 80-hour power reserve and operates at 21,600 vibrations per hour. It is currently in production and used by various Swiss watch brands requiring a reliable GMT function.