IWC Portofino Portofino Chronograph MecaQuartz Stainless Steel / Yellow Gold / White / Alligator

Reference IW3731-03

IWC Portofino Chronograph MecaQuartz Stainless Steel / Yellow Gold / White / Alligator

About this watch

The IWC IW3731-03 Portofino Chronograph MecaQuartz stands out as a remarkable blend of elegance and functionality. With its exquisite design, reliable movement, and versatile nature, it’s a watch that can elevate any outfit while serving practical purposes. The case combines stainless steel and yellow gold for a perfect balance between robustness and elegance. The 35mm diameter strikes a perfect balance between formal and casual occasions. The classic white dial features stick and dot indexes for easy readability, while the sapphire crystal protects against scratches. At the heart of the watch lies the Jaeger-LeCoultre Caliber 631 movement, blending quartz precision with mechanical craftsmanship. This MecaQuartz movement combines reliability with intricate workings, ensuring accurate timekeeping and a practical chronograph function. The IWC IW3731-03 is suitable for both men and women, thanks to its modest size and comfortable alligator leather strap. Its understated elegance makes it perfect for formal events, while also dressing down nicely for casual occasions.

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Key Features

35mm stainless steel / yellow gold case
Classic white dial with stick and dot indexes
Sapphire crystal protection against scratches
Jaeger-LeCoultre Caliber 631 MecaQuartz movement
Reliable quartz timekeeping and practical chronograph function
Modest size suitable for both men and women
Comfortable alligator leather strap

Specifications

Brand

IWC

Family

Portofino

Model

Portofino Chronograph MecaQuartz Stainless Steel / Yellow Gold / White / Alligator

Reference

IW3731-03

Movement

631

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph

Case

35mm

Dial Color

White

Crystal

Sapphire

Water Resistance

Current Listings

2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995

IWC - IW391404 · $5,995

This 2025 IWC Portofino Chronograph Black is a brand new timepiece featuring a chronograph function. The watch comes in a 39mm case and includes a full set of accessories, including the box, travel case, international warranty card, and instructions manual.

Condition: New condition
Case size: 39mm diameter

Posted at

May 24, 2026, 11:47 AM

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IWC Portofino Chronograph $3200 SHIPPED

IWC - IW391002 · $3,200

A pre-owned IWC Portofino Chronograph in working condition at the time of listing, but not guaranteed for future performance.

Condition: Pre-owned, working condition
Case Size Without Crown: 42 mm
Case Size With Crown: 45 mm
Straps Included: 1

Posted at

May 23, 2026, 12:37 PM

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IWC Portofino 42MM Black Dial, Stainless Steel Full Set

IWC - IW391010 · $4,000

This 2018 IWC Portofino Chronograph features a black dial, stainless steel case and Milanaise bracelet. It includes day and date display, small hacking seconds, chronograph function and is a full set with original box, warranty card and manual.

Condition: beautiful condition with no visible scratches
Bracelet Type: Milanaise
Case Size: 42MM

Posted at

May 22, 2026, 8:14 PM

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2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995

IWC - IW391404 · $5,995

A 2025 IWC Portofino Chronograph Black IW391404 is available for sale. It features a chronograph function and comes with a full set including the watch, box, travel case, international warranty card, and instructions manual.

Condition: New condition
Size: 39mm diameter
Year: 2025
Case Contents: Watch, Box, Travel Case, International Warranty Card, Instructions Manual

Posted at

May 21, 2026, 10:00 PM

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IWC Portofino Chronograph — 42mm — Ref. IW391029 — $2,699 Shipped 🔥

IWC - IW391029 · $2,699

This IWC Portofino Chronograph features a clean, timeless case design paired with a classic chronograph layout. It's a refined everyday luxury chronograph that wears well at 42mm.

Condition: Fair overall
Case Diameter: 42mm
Condition Notes: Crystal has minor AR coating wear, Bezel, case, caseback, and clasp show hairlines from normal wear

Posted at

May 20, 2026, 9:35 PM

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IWC Portofino Automatic Moonphase 40mm IW459402 – Box/Watch/Papers – $5000 - Warranty until 11/2029!

IWC - IW459402 · $5,000

This IWC Portofino Automatic Moonphase features a 40mm case. The watch comes with its original box, papers, and is still under warranty until 11/2029.

Box: yes, included
Papers: yes, included
Warranty: until November 2029

Posted at

May 20, 2026, 5:54 PM

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IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $7,850

IWC - IW459604 · $7,850

The IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake is a striking and elegant limited-edition piece that blends classic dress watch refinement with artistic flair. The 37mm polished stainless steel case paired with the rich burgundy/red dial gives this watch an eye-catching yet tasteful presence on the wrist.

Condition: great condition
Case size: 37.1 mm
Thickness: 11.3 mm
Dial color: burgundy/red

Posted at

May 16, 2026, 4:24 PM

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