Released in 2017 as a one-of-a-kind model, the IWC Portugieser Constant-Force Tourbillon ref. IW5901-07 combines a red gold case with a black dial and the manual-winding caliber 94800.
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
Black
