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Replacement circuit block / electronic module for ETA F03.111 and F06.111 quartz movements. The F03.111 (17.2mm diameter) is a small Trendline movement typically used in ladies’ watches, while the F06.111 (25.6mm diameter) is a larger version widely used in men’s watches. Both share the same module architecture. The circuit block includes the quartz oscillator and integrated circuitry for timekeeping, date functions, and low battery indication. Aftermarket replacement for failed original modules.
32,768 Hz quartz oscillator, 3 jewels
Central hours/minutes/seconds, date display (3 or 6 o’clock)
Low battery indicator (EOL) – seconds hand jumps every 4 seconds when battery low
Compatible with original 4000 spec modules for both calibers
Pre-connected coil assembly, ready for installation
| Parameter | ETA F03.111 | ETA F06.111 |
|---|---|---|
| Diameter | 17.2 mm (7.75‴) | 25.6 mm (11.5‴) |
| Thickness | 2.5 mm (3.7 mm overall) | 2.5 mm |
| Jewels | 3 | 3 |
| Battery | 364 / SR621SW or 377 | 371 / SR920SW or 395 |
| Battery life | 34–48 months | 68–94 months (40–55 mAh) |
| Stem | 401-906, Tap 10 | 401-1519, Tap 10 |
| Hand sizes | 1.20 / 0.70 / 0.20 mm | 1.20 / 0.70 / 0.20 mm |
| Origin | Swiss (V8 stamped) | Swiss (V8 stamped) |
| Module type | 4000 spec circuit & coil | 4000 spec circuit & coil |
Replacing failed modules in Tissot, TAG Heuer, Hamilton, Certina, Swatch, Mido, Baume & Mercier, and many other brands using F03.111 or F06.111 calibers
Common in F03.111: ladies’ watches, small dress pieces
Common in F06.111: men’s sports watches, chronographs, everyday wear
Professional watch repair and restoration
Q1: Genuine ETA part?
Yes, this is an original ETA 4000 spec electronic module. Some listings are OEM New Old Stock (NOS).
Q2: F03.111 and F06.111 use the same circuit module?
Yes, both calibers share the same 4000 module architecture. The circuit block is interchangeable between them.
Q3: Which battery is required?
F03.111 uses 364 (SR621SW) or optional 377. F06.111 uses 371 (SR920SW) or optional 395.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
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