Produced from approximately 1988 to 1998, the IWC Portofino Chronograph IW3731-04 pairs a 35.00mm stainless steel and yellow gold case with a white dial and the caliber 631 'MecaQuartz' chronograph movement.
Movement Type
Quartz
Caliber
631Jewels
25
Hands
Small Seconds
Shape
Round
Lug Distance
18.00 mm
Glass
Sapphire
Thickness
7.80 mm
Diameter
35.00 mm
Water Resistance
30.00 m
Dial Color
White
Material
White
Buckle
Bracelet
