The IWC Portugieser Constant-Force Tourbillon reference IW5901-04 was issued in 2016 as a limited edition of 5 pieces. It is equipped with the hand-wound caliber 94800, a platinum case, and a black dial. Limited to 5 units.
Movement Type
Manual
Caliber
94800Jewels
43
Reserve
96
Frequency
18000
Hands
Small Seconds
Shape
Round
Material
Platinum
Glass
Sapphire
Thickness
13.40 mm
Diameter
46.00 mm
Water Resistance
30.00 m
Dial Color
Black
