ETA SA 252.511

ETA caliber 252.511 is a Swiss quartz movement with thermocompensation, measuring 25.6mm in diameter and 3.0mm thick. It operates at 32,768 Hz with 11 jewels and achieves a typical rate of ±10 seconds per year. The movement features a perpetual calendar accurate through 2099, a dual-motor design separately driving hands and date, stop-second function, and timezone correction via a jumping hour hand. Rate adjustment is possible in 0.33-second monthly increments.