With its striking push-buttons and functional, technology-inspired dial, this chronograph brings a refreshingly sporty note to the Portofino family.

Overview
Reference: IW391029
Dial Color: Black
Case: Stainless steel
Strap: Black alligator leather strap
Diameter: 42 mm
Movement: Automatic, self-winding

Features
Small hacking seconds
Sapphire glass, convex, antireflective coating on both sides
Day and date display
Chronograph function with hours, minutes and seconds

Case
Strap width: 20 mm
Buckle width: 18 mm
Case: Stainless steel
Diameter: 42 mm
Height: 13.6 mm
Water Resistance: 3 Bar
Back case: Standard

Movement
Calibre: 79320
Movement type: Automatic, self-winding
Power Reserve: 44 hours
Frequency: 28800 Vph (4 Hz)
Components: 240
Jewels: 25
Decoration: Côtes de Genève, Perlage