ETA Caliber F06.412
ETA Caliber F06.412

ETA Caliber F06.412

Manufacturer ETA
Caliber Number F06.412, F06412
Type Quartz, battery-powered
COSC?
Possible, depends on watch
Thermo-Compensated?
Yes
Linges 11.5”’
Overall Diameter
25.6mm
Casing Diameter
26.20
Height
2.62mm (with 371 battery) or 3.22mm (with 395)
Jewels
3
Frequency
32,768 Hz
Accuracy Rating
+/- 10 seconds/year
Battery Cell Number 371 (SR920SW) or 395 (SR927SW) – see below
Battery Life
~68 – 94 months depending on the battery’s mAh
Low Battery Indicator?
Yes
Hands Count
3
Hand Sizes 1.20mm / .70mm / .20mm
Functions Central hours; central minutes; central seconds; date at 3:00
Hacking Seconds?
Yes
Mainplate Material
Brass
Country of Manufacture Switzerland, Swiss made
Known Models
(Add your watch to the comments below…)

The ETA caliber F06.412 is a Swiss made high accuracy quartz (HAQ) movement with 3 jewels. This caliber is part of ETA’s Trendline family of quartz movements and is available as a HeavyDrive or PreciDrive (thermocompensated) movement.

The F06.412 replaced the F06.411 in 2018.

Some of the topics covered in this caliber listing:

EOL:

You may see this movement listed as an EOL. EOL stands for end of life. This is a low battery indicator that is built into the circuit board to cause the second hand to jump every 4 seconds when the battery is low on juice.

Battery Life:

The F06.412 has rather long battery life when using a higher mAh cell. When using a 40 mAh cell, the battery life can be up to 68 months. With a 55 mAh battery cell, the battery lasts up to 94 months. Note that you cannot simply install a high mAh battery unless your watch is designed to handle the increased thickness. The 371 cell has a diameter of 9.5mm no matter what the mAh is, but the 40 mAh cell is only 2.1mm tall compared to the 55 mAh cell at 2.7mm. Usage will depend on the watch model and design of its case.

Crown/Stem Removal:

To remove the crown, the crown should be in neutral position (against the case). Look for the stem release hole on the movement near the crown There is a small arrow pointing to it. Putting the crown to date setting position should reveal a button in the hole that you can gently press with your tool to release the stem. Do this carefully and do not press too hard. If you damage the stem release mechanism, there doesn’t seem to be a way to fix it since it’s encased in plastic.

Date Changing:

The F06.412 has a quick set date feature with the crown in the second position. The date flip on a running watch is considered semi-instantaneous. Therefore, don’t be alarmed if there is lag from the time the date engages and flips over at midnight. The total time is takes for the date to flip can be up to an hour. If the date on your watch doesn’t flip when the hands pass midnight, it doesn’t necessarily mean your watch needs serviced or has an issue, it could simply be how the hands were installed by the manufacturer.

Replacement Price:

At the time of this post, replacement prices for the F06.112 were found online for $45.00 USD.

Additional Resources:

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Community Reviews & Questions:

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8 Comments
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AlexOr
AlexOr
3 months ago

Marathon Navigator (Steel version released in Aprl 2023) is using that movement.

Robert Teal
Robert Teal
2 months ago

Hi,

I would like to buy a HAQ watch and this movement seems to be the lowest priced entry point.

Apart from the Marathon that Alex references, does anyone know of other brands/models I might check out?

Thanks in anticipation, and thanks to the site owners for the superb resource!

Robert

Oliver
Oliver
2 months ago
Reply to  Robert Teal

Check out Scurfa. Superb dive watches designed by a saturation diver that includes these precidrive ETA movements.

Tom
Tom
2 months ago
Reply to  Robert Teal

CWC use the F06.402 in their G10.

Robert Teal
Robert Teal
1 month ago
Reply to  Tom

Thanks Tom

Pehr
Pehr
1 month ago

A lot of Tissot watches use this movement

Pehr
Pehr
1 month ago

Tissot seastar 1000 and Tissot gent

Craig Campo
Craig Campo
15 days ago

Zodiac Model Z02105 and Z02111 use this movement

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