Star Power: IWC’s Portuguese Sidérale Scafusia

A decade ago, IWC enlisted its engineers and watchmakers to create a constant force tourbillon watch as a statement of the brand’s horological prowess. The Portuguese Sidérale Scafusia, unveiled last summer, embodies that goal and more. With its astronomical complications as well as a perpetual calendar, this approximately $840,000, made-to-order watch is the most complex timepiece IWC has ever built.

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