IWC - IW5901-08

Portugieser Constant-Force Tourbillon Double Moon Red Gold / Silver

Brand: IWC
Family: Portugieser
Reference: IW5901-08 (aka: IW590108)
Name: Portugieser Constant-Force Tourbillon Double Moon Red Gold / Silver
Produced: 2017
Limited: Yes, 1 unit


Material: Red Gold
Glass: Sapphire
Back: Open
Shape: Round
Diameter: 46.00 mm
Height: 13.40 mm
W/R: 30.00 m


Color: Silver
Finish: Sunburst
Indexes: Arabic Numerals
Hands: Feuille
IWC Portugieser IW5901-08


The IWC Portugieser Constant-Force Tourbillon reference IW5901-08 was made in 2017 as a unique piece. It features a Red Gold case and a Silver dial. Inside ticks the hand-wound caliber 94800.


IWC caliber 94800 IWC manufactured 94800 calibre (94000-calibre family) is a hand-wound movement with a tourbillon escapement. A patented constant force mechanism is integrated into the tourbillon, ensuring a stable amplitude of the balance - visible through 1 second jumps of the tourbillon. After having run for 48 hours, the constant force mechanism is decoupled and the tourbillon will move in regular 1/5th of a second intervals. It furthermore features a day/night indication, double moonphase display and a 96 hour power reserve.

Reserve:96 h
Frequency:18000 bph
Time:Minutes, Hours, Small Seconds
Additionals:Constant Force Mechanism, Tourbillon Escapement, Power Reserve Indicator

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