ETA SA 256.031

ETA 256.031 is a quartz movement manufactured by ETA SA. It measures 18.2 mm in diameter and stands 1.95 mm tall on the movement, or 2.10 mm including the battery. The movement belongs to the ETA 256 family alongside calibers 256.041, 256.101, and 256.111. This variant is the LONG LIFE version, designed without an end-of-life indicator to maximize operational runtime. The motor drives the hands at 12 steps per minute. Production remains active, and the caliber appears in various entry-level watches from Swatch Group brands.