Eta Movement Grades

ETA Movement Grades

Eta Movement Grades

How Many Grades of ETA Movements Are There?

ETA offers four grades of watch movements:

Accuracy Between Grades:

These ratings may vary between specific caliber numbers, but here are the specs for the popular ETA caliber 2824-2:

  • Standard – adjusted in two positions; accuracy of +/-12 sec/day up to +/- 30 sec/day
  • Elabore – adjusted in three positions; accuracy of +/-7 sec/day up to +/- 20 sec/day
  • Top – adjusted in five positions; accuracy of +/-4 sec/day up to +/- 15 sec/day
  • Chronometer – COSC specs (learn more)

How to tell the difference between grades?

One way to distinguish between Standard/Elabore and Top/COSC grades of ETA movements is to look at the anti-shock device on the balance wheel:

StandardNovodiac / ETACHOC
ElaboreNovodiac / ETACHOC

Other Differences:

Standard and Elabore Grades:
Nickel plated balance wheel; Nivarox  hairspring; polyrubies used for pallet jewels.

Top and Chronometer Grades:
Glucydur balance wheel; Anachron hairspring; red rubies used for pallet jewels.

Similarities Between Grades:

Despite differences in accuracy and testing, all grades share some common specs and features. All grades have the same diameter, height, jewel count, lift angle, frequency, and power reserve.


Difference in finishes coming soon.

Additional Resources:

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ETA Caliber 2893-2 Watch Movement | Caliber Corner
1 year ago

[…] 2893-2 is part of the Mecaline Specialities line of ETA movements. This caliber is available in different grades and can be supplied by ETA with a Chronometer rating. The 2893-2 is very similar to the ETA 2892-A2 […]

1 year ago

Since some of the Sellita are based on ETA movements, does Sellita have the same grades?

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1 year ago

[…] go along with it. If this is the case, it could be that they are using a Premium grade Sellita (or Top grade if it’s an ETA) which runs close to COSC spec but without the official […]

1 year ago

I’m sure it’s in here some where , can I see pictures of the grades of ETA calibers?mit would be much easier for me to tell the difference.

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[…] This caliber is said to be assembled and regulated by Breitling and is a Chronometer grade (read more about grades). […]

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10 months ago

What is different between eta cal 80, v8 at35 and cal 80, v8 at24

7 months ago

What types of calibre are used in watches that retail for around $5k CAD? And where do such microbrands go to have the things like the case and dials made to their designs. I’ve been looking and find a lot of Chinese companies but no offense the quality just isn’t what I’m looking for. I don’t want my company to fail right from the first sale. There are microbrands that cost $5k so it can… Read more »

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