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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Community Reviews & Questions:

  • Keep comments respectful and follow our community guidelines.
  • Keep comments on the topic of ETA Movement Grades

For off topic or general watch questions, post in the Caliber Corner Forum.

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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
2 years ago

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

machv5
Member
2 years 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.

trackback
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
1 year ago
Reply to  Alex

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

dennisthewatchmaker
dennisthewatchmaker
1 year ago
Reply to  Foisal

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

Amir
Amir
10 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
10 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
10 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
9 months ago
Reply to  Joe

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

Novodiac.jpg
Joe
Joe
9 months ago
Reply to  Joe

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

Novodiac4.jpg
Joe
Joe
9 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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