The Portofino Perpetual Calendar features the legendary perpetual calendar developed by Kurt Klaus during the 1980s.

Overview
Reference: IW344601
Dial Color: Silver plated
Case: Stainless steel
Strap: Blue calfskin strap
Diameter: 40 mm
Movement: Automatic, self-winding, IWC-manufactured movement

Features
Sapphire glass, convex, antireflective coating on both sides
Central hacking seconds
Pellaton automatic winding
Perpetual calendar with displays for the date, day, month, leap year and perpetual moon phase

Case
Strap width: 20 mm
Buckle width: 18 mm
Case: Stainless steel
Diameter: 40 mm
Height: 12.7 mm
Water Resistance: 5 Bar
Back case: With synthetic sapphire crystal

Movement
Calibre: 82650
Movement type: Automatic, self-winding
IWC-manufactured movement: Yes
Power Reserve: 60 hours
Frequency: 28800 Vph (4 Hz)
Components: 303
Jewels: 46
Decoration: Côtes de Genève, Perlage