The Portofino Automatic 37 features the IWC-manufactured 32111 caliber and a see-through sapphire glass back displaying the movement.

Overview
Reference: IW458606
Dial Color: Silver plated
Case: 18 ct 5N gold
Strap: Beige calfskin strap with quick-change system View all compatible straps
Diameter: 37 mm
Movement: Automatic, self-winding

Features
Sapphire glass, convex, antireflective coating on both sides
Central hacking seconds
IWC bracelet quick-change system
Date display

Case
Strap width: 18 mm
Buckle width: 16 mm
Case: 18 ct 5N gold
Diameter: 37 mm
Height: 9.4 mm
Water Resistance: 5 Bar
Back case: With synthetic sapphire crystal

Movement
Caliber: 32111
Movement type: Automatic, self-winding
Power Reserve: 120 hours
Frequency: 28800 Vph (4 Hz)
Components: 163
Jewels: 21