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:

Standard Novodiac / ETACHOC
Elabore Novodiac / ETACHOC
Top Incabloc
Chronometer Incabloc

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
2 years 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
2 years 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
2 years 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
2 years 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
2 years 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
1 year ago

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

Neil
Neil
1 year 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 be done without having everything done in house.

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ETA Caliber 2836-2 Watch Movement | Caliber Corner
1 year ago

[…] ETA Movement Grades […]

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

[…] ETA Movement Grades […]

Alex
Alex
1 year ago

what grade in L 633.5 (eta 2824-2) longines? standart? elabore? top? chr?

Foisal
Foisal
11 months ago
Reply to  Alex

I am 90% sure longines, doesn’t use that system

dennisthewatchmaker
dennisthewatchmaker
8 months ago
Reply to  Foisal

doesn’t use 2824 you mean? yesq they do
longines uses top

Amir
Amir
6 months ago

I recently bought Tissot Le Locle Chronometer having ETA 2824-2 Chronometer from jomashop. However, on the backside, it has Novodiac instead of Incabloc shock system. Why is it so? I read about it and found out Novodiac is actually new shock system from Incabloc company. I don’t understand why in your article the low grade movements have Novodiac wheres as Top and Chronometer have Incabloc schock system!

Joe
Joe
6 months ago
Reply to  Amir

You and me both brother. I have confirmation from Tissot that you can find the Novodiac in their COSC Le Locle. Caused a panic at first when I saw it in there.

Joe
Joe
6 months ago
Reply to  calibercorner

Much thanks for this explanation. I almost went to war over this. It seems the stock Tissot Le Locle COSC images all the show the Incabloc. Yet if you do a deep dive on youtube to see what’s out there submitted by the public, then you’ll spot the Novodiacs if you look carefully. On a side note, I’ve had mine for three days and it hasn’t gained or lost a second.

Joe
Joe
5 months ago
Reply to  Joe

For reference, here’s a shot of my COSC Le Locle with the Novodiac:

Novodiac.jpg
Joe
Joe
5 months ago
Reply to  Joe

Sorry… not the best photographer… but here’s another:

Novodiac4.jpg
Joe
Joe
5 months ago
Reply to  Joe

And here we have another find: A Tissot Heritage COSC from the official Tissot site with Novodiac.

TissotHeritageCOSC.jpg
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