ETA Caliber 955.112

ETA caliber 955.112 is part of ETA’s Normflatline family of quartz watch movements. The 955.112 has 7 jewels with a gold tone finish and a blue circuit board. It is a “V8” movement, indicating that it is assembled in Switzerland.

Official technical documentation for this caliber was found as far back as December 19, 2005, with updates as recently as December 10, 2019.

Update 11/2023: The cal. 955.112 is no longer being offered and is no longer listed on ETA’s official site.

ETA 955.112 VS 955.412:

There is a similar caliber 955.412 which is smaller in diameter than the 955.112:

• 955.112 = 11.5”’ (25.6mm diameter)
• 955.412 = 10.5”’ (23.3mm diameter)

Interestingly, these two calibers shared the same tech sheets at one point, and also contain some interchangeable parts. This is also confirmed on the packaging of some new old stock ETA parts (source), seen in the image below:

Changing the Battery:

The ETA 955.112 is equipped with an end of battery life indicator aka E.O.L. This means that when the battery is low on power, the seconds hand will jump every two seconds, indicating that you should make arrangements to get the battery replaced.

The battery cell number is 371 (or 395), depending on the watch. The diameter of these two cells is the same (9.5mm), but the height is different (2.6mm for the 395 vs 2.1mm for the 371). Some watches (particularly ones using the slimmer battery) may include a battery cell spacer as seen in the picture below.

When putting the spacer back, the tabs on the edge of the spacer go downward (around the battery) and the points go upward.

It is also very important to note the black insulator tab under the battery tab. Make sure this is in good condition (without battery acid corrosion present) and in place under the battery when installing the new cell.

Examples of watches with this movement:

The image at the top of this page is a 955.112 found in a TAG Heuer Aquaracer.

The pics below are two different examples of 955.112 movements found in Tag Heuer Kirium watches. Both are stamped with ETA 955.112, but looking at the metal shield around the coil, TAG signed them with “TAG HEUER 3.89” and “TAG HEUER 4.0” respectively. If you have more insight as to the meaning of these numbers, or if your watch has a different number, please share in the comments below…

Update: we can add Tag Heuer 4.01 to the list. Example below, found in a Kirium reference WL111F.

Caliber Commentary:

According to a post by The Sydney Tarts:

“ETA 955.112 is a very common quartz movement found in gents’ watches. It is also one of the most reliable quartz movements you can get on the market today. The movement is easily replaceable, and a quick glance through the interwebs will net you one of these movements for about 25 bucks. So don’t worry if your watch dies on you. Just drop a new movement in and you have a brand new watch again!” –Source

Replacement Prices:

The calibre 955.112 has been discontinued and is no longer offered for sale by ETA, but there are still watch parts suppliers with stock available. Prices were found online in the range of $39.33 USD to $61.95 USD.

Other brands using the 955.112:

Since ETA is part of the Swatch Group which supplies its own watch brands with ETA movements, you may find this caliber listed with a different number depending on the brand. For example:

• Bulova (2562, 2631.10, 2802.10, 2806.10, 2962, 6182.37)
• Certina (caliebrs 115, 119, 260, 753-1)
• Longines (caliber 115.2)
• Mido (caliber 115)
• Tissot (calibers 3232, 3239, 3332, 3542)

Please note that the list above is not exhaustive and may have some errors. Comment below if you know more…

ETA 955.112 Tech Sheets (pdf):

Additional Resources:

• Caliber 955.112 official page on ETA’s website (this link has been removed from ETA’s site http://www.eta.ch/index.php?id=124&L=2)
• More ETA movements