Sellita Caliber Sw280 1 Drawings

Sellita Caliber SW280-1

Sellita Caliber Sw280 1

Manufacturer Sellita
Caliber Number SW280-1
Base Caliber
Automatic, self-winding mechanical
5.4mm thick
Jewels 26
Power Reserve 41 hours
Beat Rate
28,800 bph, 4Hz
Lift Angle
50 degrees
Amplitude Range
200-315 degrees
Rotor Style
Anti-Shock Device
Novodiac or Incabloc
Functions Central hours; central minutes; central sweeping seconds; moonphase indicator at 6:00; date at 3:00
Hacking Seconds? Yes
Quickset Date? Yes
Country of Manufacture Swiss made in La Chaux-de-Fonds, Switzerland
Known Models
Mühle-Glashütte Teutonia IV Moonphase, Detroit Watch Company Pontchartrain Louis XIV, Steinhart Marine Moon Phase Silver, (Add your watch to the comments below…)

The Sellita caliber SW280-1 is essentially an SW200-1 with a moonphase complication. Learn more about the SW200-1 base movement here.

Sellita Caliber Sw280 1 Drawings


There are four grades of SW280-1:

  • Standard
  • Special aka Elabore
  • Premium aka Top
  • Chronometer Grade

Learn more in the Guide to Sellita Grades.

SW280-1 VS SW288-1:

Sellita has a similar calibre SW288-1, also with a moonphase indicator. The SW280-1 being discussed on this page has been in production since at least 2015. The SW288-1 was introduced sometime around 2020.

Both of these calibers are based on the SW200-1 (ETA 2824-2 clone movement), but with moonphase complications. The main difference is in how the moonphase is displayed.

  • SW280-1 has a smaller moonphase disc module that overlaps the datewheel at 6:00.
  • SW288-1 has a larger moonphase module that fills the entire inside of the datewheel.

The SW280-1 is more traditional, whereas SW288-1 powered watches can offer a larger panoramic style moonphase dial. See the image below…

Sellita Sw280 1 Vs 288 1

Crown/Stem Removal:

Official Sellita documentation states that the crown should be in the time setting position (pulled out two clicks) before being extracted.

Be sure to use a 1mm screw-driver, avoid using tweezers or any other tool with a point because this could jam the setting lever and damage the setting lever spring.

Replacement Prices:

At the time of this article, prices for individual SW280-1 movements are unavailable. This could mean that Sellita is not selling movements to resellers, and only sell to watch brands at this time. Or, it can simply be that the caliber is still too new. There are not many watches with this movement on the market, so watch parts sellers most likely wouldn’t want to hold stock. If you have experience with ordering in bulk from Sellita, please share in the comments below…

Examples of watches with this movement:

Below is an example of the SW280-1 in a Detroit Watch Company Pontchartrain Louis XIV watch. They list the movement as having an Elabore finish with Novodiac anti-shock (likely an error since Incabloc is pictured), Glycidur balance wheel, decorated with blued screws, perlage, and Geneva stripes. (source).

Detroit Watch Company Pontchartrain Louis Xiv Moonphase Sw280 1

Steinhart uses the SW280-1 in their Marine Moon Phase Silver watch. They are very transparent about it, stating the following on their product page: “The movement of the “STEINHART Moon Phase silver” is a SW280-1 automatic movement from SELLITA Swiss Made.” It appears to be a standard grade with Novodiac anti-shock and a custom rotor with a Steinhart logo cutout.

Steinhart Marine Moon Phase Silver Sw280 1

Brands Using SW280-1 as a Base Movement:

Some watch brands use the Sellita SW280-1 off the shelf without modifications or custom rotors, but others may use this movement and create their own caliber designation for it. This list may be short, as not many watches are powered by this caliber yet. If you know of more, please comment below.

Additional Resources:

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