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Sellita Grades

Sellita Grades

Sellita Grades

Did you know there are 4 Grades of Sellita Movements?

Just like some ETA movements, Sellita calibers are also available in different grades: Standard, Special, Premium, Chronometer.

Accuracy Between Grades:

These ratings may vary between specific caliber numbers, but here are the specs for the popular SW200-1 and SW215-1 which many Sellita movements are based on.

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

How to tell the difference between grades?

One way to distinguish between Standard/Special and Premium/COSC grades of Sellita is to look at the anti-shock device:

StandardNovodiac
SpecialNovodiac
PremiumIncabloc
ChronometerIncabloc

Other Differences:

The pallets on the Standard/Special grade are polyrubies. On Premium and COSC grades the pallets are red rubies.

Similarities Between Grades:

Despite differences in accuracy and some parts, all grades share some common features.

  • The escape wheel is polished, epilame-coated, and uses molybdenum disulfide (MoS2).
  • The pallet forks are polished.
  • The balance wheel is gilt.
  • The hairspring collet is Nivatronic.
  • The balance staff is epilame-coated.

Finishing:

In addition to different grades, there are also different finishes: Standard, Refined, and Tailor Made. The images below are a side-by-side comparison between the Standard and Refined finishes.

Additional Resources:

  • List of Sellita calibers here
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Dale
Dale
4 months ago

I have almost a dozen watches with Sellita movements and have been using them for years. This is the first I’ve learned about the different grade options. Truly informative, thank you.

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