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Sellita Caliber Sw330 1

Sellita Caliber SW330-1

Sellita Caliber Sw330 1

Caliber NumberSW330, SW330-1
Base Caliber
Sellita SW300-1
Casing Diameter
Vibrations Per Hour28,800 bph, 4Hz
Lift Angle51 degrees
Amplitude Range
200 – 315 degrees
Power Reserve42 hours
Quick Date?Yes
SpringNivatronic, Nivaflex NM
Balance Wheel
Nickel or Glucydur
Main Plate Material Brass
Bridges Material
FunctionsHours, minutes, central seconds, central GMT hand, date at 3:00
Country of ManufactureSwitzerland
Known Models
Bravur Geography, Monta Atlas, Muhle Glashutte Seebataillon GMT, Bamford London GMT, Farer Oxley, Farer Lander III, Dufrane City Limits GMT, Steinhart GMT-Ocean, Zahnd & Kormann No. 2 GMT (Please add yours to the comments below…)

The Sellita SW330-1 is an automatic watch movement with a second time zone display via a centrally located GMT hand.

Sellita Caliber Sw330 1 Drawings

Sellita SW330-1 VS ETA 2893-2:

While the components are not 100% interchangeable, the caliber SW330-1 is essentially a clone of the ETA 2893-2. In fact, these movements are so similar that brands will often use them interchangeably and not disclose which one you are getting beforehand. If the brand lists both calibers and you prefer one over the other, be sure to make the request when ordering your watch new from the manufacturer.

Dimensions, beat rate and power reserve are among the many similarities, but one notable difference is the jewel count. The SW330-1 has 25 jewels and the ETA 2893-1 has 21 jewels.

Here is an image comparing the two movements:

Sellita Sw330 1 Vs Eta 2893 2

3 Grades and Accuracy:

There are 3 grades of the Sellita SW330-1. The grades and main differences are as follows:

  • Spécial (Elabore) – Nickel balance wheel, adjusted in 4 positions, average rate of +/-5 seconds/day, maximum deviation of 20 seconds/day in all positions, isochronism of +/-15 seconds/day.
  • Prémium (Top) – Glucydur balance wheel, adjusted in 5 positions, average rate of +/-4 seconds/day, maximum deviation of 15 seconds/day in all positions, isochronism of +/-10 seconds/day.
  • Chronomètre (COSC) – Glucydur balance wheel, COSC criteria

To sum it up, the Premium grade will give you better timekeeping and a more refined look than the Special grade. You can learn more about Sellita grading here.

Interesting note: This may not be interpreted correctly, but Sellita seems to mention in the official documentation that when a lot of movements are purchased, only 95% of them must be within the specified limited.


There are two main finishes from the factory: Standard and Refined. There is an option for custom or tailor-made finishing as well.

Sellita Caliber Sw330 1 Finishes

Crown Positions:

  • 1 – Manual winding
  • 2- Quick adjustment of the date, quick adjustment of the GMT hand
  • 3 – Time setting, hacked seconds

Replacement Prices:

At the time of this post, replacement prices were found online for around $480.00 USD.

Additional Resources:

  • Sellita’s official SW330-1 tech sheet here
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Apar Bandung
Apar Bandung
9 months ago

fabulous movement and great accuracy.

Glycine Airman DC-4 – SaFonaGastroCrono
9 months ago

[…] reloj porta el calibre automático GL293, que es un Sellita 330-1 con 25 rubíes, a su vez basado en el ETA-2893-2, de grado élaboré y con rotor firmado. El […]

Áron Biacsi Schön
Áron Biacsi Schön
8 months ago

Glycine Airman Worldtimer GMT

Owyn Davies
Owyn Davies
8 months ago

I have one in a C65 Trident. Can this movement be over-wound?

7 months ago

Revue Thommen GMT Diver. I love it! Loses 1 second per week.

7 months ago

Correction: My R-V loses 2 seconds per day over a 15 day period.

DuFrane City Limits GMT – Beans & Bezels
7 months ago

[…] watch uses a Sellita SW330 GMT movement. Thanks to the exhibition case-back, you get to appreciate the DuFrane engraved rotor […]

DuFrane City Limits GMT – SaFonaGastroCrono
7 months ago

[…] watch uses a Sellita SW330 GMT movement. Thanks to the exhibition case-back, you get to appreciate the DuFrane engraved rotor […]

New Watch Alert: 9/25/2020 - The Truth About Watches
5 months ago

[…] is heading skywards – problem? – but it works artistically. The Oris calibre 798 (base Sellita SW330-1) is an accurate, reliable and easily serviced workhorse that helps Oris fulfil its affordability […]

Paul Bunton
Paul Bunton
5 months ago

Your image at the top of the page says sw300 at the balance wheel?

Monta Caliber M-23 Watch Movement | Caliber Corner
2 months ago

[…] ETA 2893-2 or Sellita SW330-1 […]

2 months ago

Glycine Airman if you wanna add

James Connell
James Connell
1 month ago

This movement is in my Mecchaniche Venezianne Neriede GMT sub if you want to add a microbrand

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