Eta Caliber 2834 2

ETA Caliber 2834-2

Eta Caliber 2834 2

Manufacturer ETA
Caliber Number 2834-2
Movement Type Automatic, self-winding mechanical
Lignes 11.5”’
Overall Diameter
29mm
Height
5.05mm thick
Jewels 25
Power Reserve ~38 hours
Vibrations Per Hour 28,800, 4Hz
Lift Angle
50 degrees
Shock System Novodiac or Incabloc
Regulator System Etachron with fine timing device
Materials
Brass (main plate and bridges)
Rotor
Ball bearing
Hairspring
Nivarox 2
Hacking Seconds? Yes
Hand-Windable?
Yes
Rotor Winding Direction
Bi-directional
Features Central hours; central minutes; central sweeping seconds; full day of the week at 12:00; date at 3:00 or 6:00
Country of Manufacture Switzerland, Swiss made
Known Models (Add your watch in comments below…)

The ETA caliber 2834-2 is a Swiss made automatic movement with a day-date complication. The calendar display on this movement is similar to the Rolex President Day-Date, with a full day of the week indicator at 12:00 and a date at 3:00 (also possible at 6:00 depending on the dial design).

The 2834-2 is part of ETA’s Mecaline collection. Official documentation was found dated as far back as 2009, with updates as recently as 2018.

2834-2 VS 2836-2:

There is also a similar caliber 2836-2. The main difference here is that the 2836-2 features an inner day of the week calendar wheel, placing the day indicator left of the date at 3:00 on the dial (with abbreviated spelling). The 2834-2 being discussed here has an outer day wheel, placing a panoramic style day of the week indicator at 12:00 (with the full spelling).

Because of the different calendar display, the 2834-2 has a larger overall diameter of 29mm (13”’), compared to the regular 28XX size of 25.6mm (11.5”’). For this reason, the 2834-2 and 2836-2 are not interchangeable and cannot be directly swapped.

Setting the 2834-2:

  • Position 0 – Crown in hand-winding position (running position). This can be against the watch case in watches without a screw-down crown, or in unscrewed position on watches with a screw-down crown.
  • Position 1 (one click) – Quickset adjustment of the day and date. Turning the crown clockwise will advance the date. Turning the crown counterclockwise will advance the day of the week.
  • Position 2 (two clicks) – Time setting position with hacking seconds.

Note: To avoid damaging the movement, do not attempt to set the date when the hands are between the hours of 9pm and 3am.

Power Reserve:

According to ETA, it takes a minimum of 27 winds of the crown to fully wind the movement. The watch community seems to agree on 30-40 turns being sufficient to reach full power reserve. In contrast, when depending primarily on the rotor (oscillating weight) to wind the movement, it can take up to 1,250 turns or 1 hour and 30 minutes of the movement in motion.

Although the power reserve of the 2824-2 based movements, including this 2824-2, is widely known to be around 38 hours (for example, as listed in ETA tech sheets dated 2018), the official ETA website claims this caliber has a “typical power reserve” of 42 hours (as of 2021). Please comment below as to the power reserve you have experienced with your 2834-2 powered timepieces.

Drawings Front and Back:

Eta Caliber 2834 2 Drawings Front Back

Replacement Prices:

As with most ETA movements, although the 2834-2 is unavailable from ETA, replacement movements and parts can still be found online.
Additional Resources:


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Ryan C.
Ryan C.
1 month ago

Thank you so much for posting the warning about changing the complication. I have this calibre being delivered today in a Tissot III stainless, black dial. You may have saved me from damaging the movement.

I will perform accuracy & power reserve tests as soon as possible and post an update.
Godspeed

;
Venus Caliber 178

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