ETA F07.111 – Technical Communication

General Overview

• Caliber: ETA F07.111

• Type: Analog quartz movement with central seconds and date

• Ligne/Diameter: 11½ lignes (approximately 25.60 mm)

• Movement Height: 3.90 mm

• Total Height: Approximately 5.60 mm (including sweep second pinion)

• Jewels: 3 synthetic jewels

Functional Features

• Display: Hours, minutes, center seconds

• Date Function: Semi-instantaneous change, typically positioned at 3 o’clock

• Stop-Second (Hacking) Function: Yes – the seconds hand stops when the crown is pulled to the time-setting position

Battery and Power

• Battery Type: Silver-oxide 371 (1.55 V)

• Battery Life: Approximately 94 months (using a 55 mAh cell)

• Battery Height on Movement: Around 3.72 mm (371); alternate: 395 cell up to 4.32 mm

• End-of-Life Indicator (EOL): Seconds hand jumps in 4-second intervals when battery voltage drops below approximately 1.30 V

Technical Specifications

• Frequency: 32,768 Hz

• Operating Temperature: Recommended testing and functioning between 20°C and 25°C

• Hand Hole Sizes:

  • Hour: 1.20 mm

  • Minute: 0.70 mm

  • Seconds: 0.20 mm

• Stem Type: Tap 10, commonly using ETA 401-2021 or F07-specific variants

Service and Lubrication

• Assembly Torque: 0.6–0.7 Ncm for bridge and key screws

• Lubrication Guidelines:

  • Moebius 9014 or 9034 for low-friction points

  • Moebius D5 or HP-1300 for gear train and high-friction zones

• Disassembly Note: Only qualified personnel should attempt repair or disassembly

• Environmental Note: Lubricants and batteries must be handled and disposed of in compliance with local environmental safety regulations

Compatibility and Use

• Movement Platform: Shares core architecture with F06.111 and F06.161

• Replacement Option: Can serve as an upgrade from older calibers like ETA 955.112 or similar 11½-ligne quartz movements

• Use in Watches: Commonly found in mid-range and fashion Swiss watch brands due to its standard size, reliability, and long battery life

Summary Table

Notes for Watchmakers

1. Confirm case and dial clearance due to the movement’s full height of 5.60 mm.

2. Choose the correct stem length and threading to match case design.

3. Verify the EOL indicator during battery changes to ensure proper function.

4. Use recommended lubricants to preserve accuracy and reduce wear.

5. Replace with compatible ETA quartz calibers when performing movement swaps in service.

Conclusion

The ETA F07.111 is a reliable, widely adopted quartz movement with solid construction and excellent autonomy. Its compatibility with existing ETA parts, standardized layout, and enhanced battery life make it a preferred option for brands and watchmakers alike.