Some of the topics covered in this caliber listing:
How Many Grades of ETA Movements Are There?
ETA offers four grades of watch movements:
- Standard
- Elabore (Elaborated)
- Top
- Chronometer
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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