|Reference:||IW5901-04 (aka: IW590104)|
|Name:||Portugieser Constant-Force Tourbillon Double Moon Platinum / Black|
|Limited:||Yes, 5 units|
The IWC Portugieser Constant-Force Tourbillon reference IW5901-04 was made in 2016 as a limited edition of 5 pieces. It features a Platinum case and a Black dial. Inside ticks the hand-wound 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.
|Time:||Minutes, Hours, Small Seconds|
|Additionals:||Constant Force Mechanism, Tourbillon Escapement, Power Reserve Indicator|