ETA SA 210.001

The ETA 210.001 is a quartz movement manufactured by ETA SA in Grenchen, Switzerland. It has a case fitting diameter of 20.00 mm and a height of 0.98 mm on the movement, varying from 1.20 mm to 2.00 mm depending on battery selection (Li 1.05V, Ag2O 1.25V, or Ag2O 1.45V). The movement uses an electronic module with stator and rotor and is designed without a date complication or sweep second hand—the cannon pinion is explicitly specified for this configuration. It shares its platform with the caliber 210.011, which adds a date complication.