ETA F04.111 – Technical Communication

General Description

• Manufacturer: ETA SA Manufacture Horlogère Suisse

• Type: 3-hand quartz movement with date function (date at 3 o’clock)

• Ligne / Diameter: 8¾''' ≈ 19.40 mm

• Movement Height: 2.50 mm (movement only)

• Overall Height (top of seconds pinion): approximately 4.0 mm

Mechanical Specifications

• Jewels: 3

• Hands Diameters: hour 1.20 mm, minute 0.70 mm, sweep second 0.20 mm

• Stem Replacement: ETA-stem 401‑1520, Tap 10

Power, End-of-Life and Performance

• Battery: Renata R364 (also known as 364/SR621SW), 1.55 V silver-oxide

• Battery Life: Up to 36 months typical

• EOL Function: Seconds hand jumps in 4-second intervals to indicate low battery

Movement Functions

• Time Display: Hours, minutes, sweep seconds

• Date: Semi-instantaneous change at 3 o’clock

• Optional Variants: Versions with date at 4 o'clock (“–4” suffix) and 2-hand variant (“–2”) exist, with slightly reduced height (e.g., 3.6 mm for 2-hand versions)

Service and Interchangeability

• Compatible stems: Same as for F03.111 family (ETA 401‑1520, Tap 10)

• Drops-in for these variants:

  • F04.111-2 (2-hand + date)

  • F04.111-4 (date at 4 o’clock)

  • F04.111-D3, -D6 (different dial foot configurations)

Summary Table

Technical Notes for Watchmakers

1. Battery change: Use Renata 364. Watch for EOL behavior to confirm battery status.

2. Stem compatibility: Uses standard stem 401‑1520/Tap 10. Ensure proper fit.

3. Movement height: 2.50 mm is compact. Total height with dial and hands is about 4.0 mm.

4. Variants: Choose the correct sub-model based on date window position and dial feet.

5. Service tools: Maintain clean contacts. Avoid pressure on crystal due to slim profile. Follow ETA lubrication standards for all F04.11X modules.

Conclusion

The ETA F04.111 is a dependable, precise quartz movement ideal for modern 3-hand watches with date. It supports flexible configurations, offers excellent battery life, and includes an End-of-Life indicator for added convenience. Its robust design and ETA compatibility make it a preferred choice among watchmakers worldwide.