IW504101
Portugieser Sidérale Scafusia
Manual-winding, Diameter 46.0 mm
PRODUCT INFORMATION
- Black dial
- Black alligator leather strap Strap width 22.0 mm
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Portugieser Sidérale Scafusia
The most complex watch made by IWC Schaffhausen is also a personalized astronomical instrument: the back of the watch shows the night sky as you see it from your own home.
Constant-force tourbillon | IWC Schaffhausen
IWC integrated a patented constant-force mechanism into a tourbillon, which ensures that the amplitude of the balance – and thus the watch’s accuracy – remain absolutely constant, initially by disconnecting the escapement from the direct flow of energy generated by the gear train. The energy is stored temporarily in a balance spring and dispensed to the escape wheel. In the process, the tension in the spring is increased once a second and the seconds hand in the tourbillon advances in one-second steps. This ensures an extremely regular and precise rate over a period of at least 48 hours. After approximately 2 days, the mechanism switches from constant-force mode to normal mode, as indicated by the one-fifth-of-a-second movements in the seconds hand.
- Features
- Case
- Movement
- Packaging
- Case Platinum Case
- Diameter 46.0 mm
- Height 17.6 mm
- Back case See-through sapphire glass back
- Water resistance 3.0 bar
- Calibre 94900 Calibre
- Movement type Automatic winding IWC-manufactured movement
- Movement type Manual-winding
- Power Reserve Indicator 96 hours
- Frequency 18'000 VPH (2.5 Hz)
- Jewels 56
- Finishing Sand-blasted
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