ETA SA C115

The C115 is an automatic movement manufactured by ETA SA. It combines a module—likely from Dubois Depraz—with Soprod's A10-2 or M100 base, creating a modular design that incorporates small seconds, a power reserve indicator, and a date display. The movement operates at 28,800 vph and features a 24-hour hand, quickset date, and central sweep seconds. Previously known as Calibre SOP 9335/A10-2, this caliber remains in production and is used by various Swiss watch brands.