The IWC Portugieser Constant-Force Tourbillon, reference IW5901-01, was released in 2016 as a one-of-a-kind piece. It houses the hand-wound caliber 94800 within a red gold case and features a grey dial. Limited to 1 unit.
Movement Type
Manual
Caliber
94800Jewels
43
Reserve
96
Frequency
18000
Hands
Small Seconds
Shape
Round
Material
Red Gold
Glass
Sapphire
Thickness
13.40 mm
Diameter
46.00 mm
Water Resistance
30.00 m
Dial Color
Grey
