IWC Portuguese Sidérale Scafusia watch is sound

Taking a lesson from MB&F showing off their "friends," IWC features six of the main people who worked on the creation of the Portuguese Sidérale Scafusia. The most well-known of which is the now horologically famous Jean-Francois Mojon, who while not part of IWC, was contracted by them to work on the Portuguese Sidérale Scafusia project.

The result of all the preparation is the new IWC Calibre 94900 movement. It has over 500 pieces and contains a main movement sections with a module for the astronomical data. A new technology employed in the movement is a constant-force tourbillon. The purpose of this is to increase the rate reliability of the movement. It doesn't work for all 96 hours of the power reserve, but the middle 48 hours are supposed to offer extremely consistent power to the movement. This means that the watch will be more accurate. The purpose of a constant-force escapement is to decrease the variation in rate results that occurs from the fact that a fully wound mainspring releases more power than an almost totally unwound mainspring. In this case it has been applied directly to the tourbillon.