IWC Portuguese Siderale Scafusia Watch - Two Ways of Measuring Time

Aug 29, 2011
IWC gladly delivers its new Portuguese Siderale Scafusia watch, which is striking from a distance and even more exciting after a closer inspection.


The company invested more than 10 years in developing the timepiece, which will surely mark a milestone in the watchmaking history. According to Georges Kern, CEO of IWC Schaffhausen, this novelty is a horoligal feat uniting solar time with sidereal time, together with astronomical displays, in a single watch."

The new IWC watch attracts the audience not only with its clearly laid-out face, but also with its mesmerizing bottom. The black dial, equipped with Arabic numerals and a railway minute circle, ensures central hour and minutes, that is solar time, used on earth.

For observation of the stars, however, sidereal time is used. Solar time measures the average time between the sun's passage over a given meridian, while sidereal time is based on the time the earth needs to complete a rotation around its own axis. Thus, a sidereal day is about four minutes shorter than an average solar day. For the model to indicate sidereal time, the craftsmen at the manufacture have created a 24-hour counter at 12 oclock.

Another distinctive feature of the display is an impressive tourbillon mechanism, presented in the huge opening between 7 and 11 oclock. Its titanium cage bears a seconds hand. The design of the display is completed by a power reserve indicator.


The reverse side of the new IWC Portuguese Siderale Scafusia watch enchants the users eye with a customized celestial chart and horizon, sunrise and sunset display, sidereal time and solar time indications; day, night and dusk display under celestial chart as well as a perpetual calendar with a display, indicating leap years and a number of day.

The 46mm timepiece is rendered in platinum or red gold, as specified by the customer. Its water-resistance is assured down to 3 bars. The top of the case is protected by a convex sapphire crystal, glare-proofed on both sides.

The sapphire glass is also used for the case-back, which opens up to the wearers eye a hand-wound mechanical calibre 94900 movement. Paved with 56 jewels, the mechanism runs at the rate of 18,000 vibrations per hour and provides a 96-hour power reserve.

The new IWC watch is teamed with a strap as specified by the customer. The strap joins to the IWC folding clasp.

Discover a nice selection of IWC watches:




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