Eta Caliber 955 402

ETA Caliber 955.402

Eta Caliber 955 402

ManufacturerETA
Caliber Number955.402, 955402
Lignes
10.5”’
Diameter
23.3mm
Height2.5mm thick
Jewels
7
Frequency32,768 Hz
Battery Cell Number371 (or 395 depending on watch model)
Stem401-906 (tap 10)
Hand Count
2 or 3
Hand Sizes1.20mm (hrs) / .70mm (mins) / .20mm (secs)
FunctionsCentral hours; central minutes; central seconds
Hacking Seconds?
Yes
Low Battery Indicator (EOL)?
Yes
Country of ManufactureSwitzerland, Swiss made (V8)
Known Models
Movado Juro (Add your watch in the comments below…)

The ETA caliber 955.402 is a 3-haner (also available as a 2-hander), time-only quartz movement. This caliber is part of ETA’s Normflatline family of quartz movements. Official documentation for this caliber was found dated as far back as 5/2001, with updates as recently as 8/2009.

This movement is possible with a seconds hand and without. On watches without a seconds hand, there will be a cap on the cannon pinion. High hand parts (cannon pinion and hour wheel) for thicker dials.

Movement Text:

The example below has MOVADO pad printed on the blue part of the circuit board.

Eta Caliber 955 412 Movado

Other standard text on the 955.402 includes:

  • Upper blue plastic part: Swiss / Seven 7 Jewels / V8
  • Main plate near the battery: Unconfirmed code – possibly a date code?
  • Main plate engraving near the coil: ETA logo / 955.402

Eta 955 402 955402 Logo Caliber Number Stamp

955.402 VS 955.412 / 955.422:

There are similar calibers within the 955.4X2 family, with most of the differences being with the calendar system (day/date). Apart from the calendar (or lack of a calendar), most of the parts are interchangeable.

955.402955.412
No DateDate at 3:00 (or 6:00)

 

Low Battery Indicator:

If the seconds hand on your watch starts “jumping” or skipping every two seconds, do not be alarmed. This is simply the low battery indicator or end of battery life indicator feature of the 955.402. When this happens, it simply means it’s time for the battery to be replaced.

Note: The 2-hander versions of this movement do not have a way to indicate that the battery is low since they don’t have a seconds hand.

Battery Change:

The battery in the the ETA caliber 955.402 is either a 371 or 395, depending on the watch model.

The 371 and 395 are the same diameter, but the 395 is thicker (2.6mm) and higher capacity than the 371 (2.1mm). Sometimes, if the watch has a metal spacer above the battery, you may be able to fit a 395 inside the case. But it is recommended to stick with the battery cell number that manufacturer originally used. The Movado pictured below uses a 395:

Eta Caliber 955 402 Battery

When changing the battery make sure that the black insulator tab ( is intact and in place below the battery.

Expected battery life:

ETA officially claims that for a fresh battery install, a 371 battery should last up to 68 months and a 395 should last up to 94 months.

If you are going to put the watch in storage for a while without wearing it, you can pull the crown out 2 clicks to time-setting mode to hack the movement (stop the seconds hand) and put the movement into a sort of energy saving mode. If you are going to do this, be careful of the crown being pulled out.

Crown and Stem Removal:

To remove the crown/stem on your 955.402 powered watch, look for the arrow and a round circular detent button. Carefully press the button down with your tool and pull the stem out of the watch.

Eta 955 402 Crown Stem Removal

Replacement Prices:

At the time of this post, replacement prices for the 955.402 were found in the range of $37.30 to $79.95 USD.

ETA 955.402 Tech Sheets (pdf):

Additional Resources:

Seagull Caliber St19

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