The Sidérale Scafusia is the most expensive and most complex watch to ever come out of IWC. It features an enormous constant force tourbillon, a perpetual calendar, and full sky-cart on the caseback.

For the full story, visit HODINKEE: hodinkee.com/blog/2012/2/21/in-depth-the-iwc-siderale-scafusia-live-photos-video-explana.html

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