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
TopIncabloc
ChronometerIncabloc

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.

Finishing:

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 […]

Zach
Zach
1 year ago

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

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Tudor Caliber T601 Watch Movement | Caliber Corner
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 […]

DP
DP
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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Breitling Caliber B17 Watch Movement | Caliber Corner
11 months ago

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

Kaum kusam
Kaum kusam
10 months ago

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

Neil
Neil
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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ETA Caliber 2836-2 Watch Movement | Caliber Corner
2 months ago

[…] ETA Movement Grades […]

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Davosa Caliber DAV 3021 Watch Movement | Caliber Corner
1 month ago

[…] ETA Movement Grades […]

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