ETA F04.115 Movement F04.111

• Basic Parameters:
  • Dimensions: Diameter of 19.4 mm and thickness of 2.50 mm.
  • Jewels: 3 synthetic jewels.
  • Battery: Typically uses a 364 battery (SR621SW).
• Functional Features:
  • Time Display: Displays hours and minutes; some versions are equipped with a central second hand.
  • Date Display: The date display window is located at the 3 o’clock position.
  • Special Functions: Features a second-stop/motor-stop function and an End-of-Life (E.O.L.) indicator. When the battery is nearly depleted, the second hand will jump every 4 seconds to alert the user that the battery needs replacement.
• Technical Features: Adopts heavy-drive technology, which provides more stable power output and ensures the movement operates with precision.
• Theoretical Battery Life: With a 20.0 mAh battery, the theoretical battery life is 34 months; with a 28.0 mAh battery, the theoretical battery life extends to 48 months.

Key Term Notes:

• End-of-Life (E.O.L.) Indicator: A practical warning function in quartz movements, designed to remind users of low battery power before the movement stops completely, avoiding sudden timekeeping failure.
• Heavy-Drive Technology: A power optimization technology for watch movements, which enhances the stability of power transmission between internal components, reducing the impact of external factors (such as slight vibrations) on timekeeping accuracy.