ETA SA C135

Soprod Cal. C135 is an automatic movement manufactured by ETA SA. It operates at 28,800 vph with a 42-hour power reserve and 25 jewels. The movement features a modular construction, combining a Dubois Depraz module with the M100 base, offering day and date windows at 12 and 3 o'clock respectively, along with a GMT hand and quickset date function.