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IWC 50900

Cal. 50900 is an oversized in-house eight day tourbillon movement in the Cal. 50000 family produced by IWC since 2010.


On its release in 2000 in the limited-edition IWC Portugieser 2000, IWC's Cal. 5000 was lauded by the brand's followers. It marked the restart of completely-in-house watch movement development for the company and brought back the legendary Pellaton winding system. The movement was seen as a landmark in other ways, with 8-day power reserve, automatic winding, and a massive 16.75 ligne (38.2 mm) diameter.

In 2004, IWC introduced the Portugieser Tourbillon Mystère, Ref. 5042 with a new version of the Cal. 5000. The new Cal. 50900 adds a tourbillon and retrograde power reserve indicator to the movement family. The tourbillon is visible through an opening in the dial at 12 00, while the retrograde power reserve needle sits at 4 30. Running small seconds are placed at 9 00.

In 2010, IWC introduced the Portugieser Tourbillon Mystère Rétrograde, Ref. 5044 with a new version of the Cal. 50900. The new Cal. 51900 adds a retrograde date by pointer at 7 30 to the movement. The power reserve indicator is also retrograde and is moved back to 3 00.

Cal. 51900 was updated in 2017 with a perpetual calendar module to become Cal. 51950. This was used in the limited-edition Portugieser Perpetual Calendar Tourbillon "150 Years", Ref. 5045.





Production period:

  • Production 2004-Present

See Also

iwc_50900.txt · Last modified: 03.07.2022 15:34 by

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