IWC Portofino Portofino Chronograph MecaQuartz Stainless Steel / White / Calf
Reference IW3731-05
About this watch
The IWC IW3731-05 Portofino Chronograph MecaQuartz is a stunning timepiece that beautifully blends tradition with modern technology. Its elegant design, innovative movement, and practical features make it a remarkable example of what IWC has to offer. The watch's sleek stainless steel case glimmers under light, while the white dial offers perfect contrast for readability. The rounded shape and minimalist aesthetic make it a versatile accessory suitable for both formal and casual occasions. At its core lies the remarkable Jaeger-LeCoultre caliber 631, often referred to as the 'MecaQuartz.' This movement combines quartz accuracy with mechanical chronograph functionality, resulting in impeccable precision. With functions for hours, minutes, small seconds, and a date display, this watch is more than just a pretty face. The chronograph allows you to time events with ease, making it practical for everyday use. The watch features stick hands that glide smoothly over the dial, providing a classic look that matches its overall aesthetic. A high-quality calf leather strap complements the watch's elegance while ensuring a comfortable fit. With a water resistance rating of 30 meters, this watch is suitable for daily wear but not designed for diving adventures.
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Key Features
- Jaeger-LeCoultre caliber 631 movement
- Sleek stainless steel case
- White dial with stick and dot indexes
- Chronograph functionality
- High-quality calf leather strap
- Water resistance up to 30 meters
Specifications
- Brand
- IWC
- Family
- Portofino
- Model
- Portofino Chronograph MecaQuartz Stainless Steel / White / Calf
- Reference
- IW3731-05
- Movement
- 631
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date
- Chronograph
- Case
- Yellow Gold 35mm
- Dial Color
- White
- Crystal
- Sapphire
- Water Resistance
- 30
Current Listings
![[WTS] IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $7,850](https://preview.redd.it/zsy32d9m6k1h1.jpg?width=640&crop=smart&auto=webp&s=d5bbbdffad0e307da19b114b591daa26e009b26c)
IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $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
![[WTS] IWC Portofino Chronograph $3200 SHIPPED](https://preview.redd.it/w0bak8p3yi1h1.jpg?width=640&crop=smart&auto=webp&s=938a0110af7e2f339dec166329b50b2499f31d78)
IWC Portofino Chronograph $3200 SHIPPED
This IWC Portofino Chronograph features a 42 mm case without crown and 45 mm with crown. It includes the original strap and buckle.
- Condition: Pre-owned, working condition, sold as-is
- Case size: 42mm diameter
- Band type: original
![[WTS] 2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395](https://preview.redd.it/v8trb6g7u41h1.jpg?width=640&crop=smart&auto=webp&s=b066caef86802e393fe61b87ec2544f4f2f1abba)
2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395
A 2021 IWC Portofino Chronograph White, a 42mm chronograph watch featuring a white dial.
- Condition: Excellent condition with minimal signs of wear
- Year: 2021
- Size: 42mm diameter
- Contents: Box, Travel Case, International Warranty Card, Instructions Manual
![[WTS] 2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995](https://preview.redd.it/2xwwm0unt41h1.jpg?width=640&crop=smart&auto=webp&s=b45fa1fe2807393fa5a44e46e680cc783c1c630a)
2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995
Up for sale is a IWC Portofino Chronograph Black, a 39mm timepiece with chronograph functionality.
- Condition: New condition
- Year: 2025
- Case size: 39mm
![[WTS] 2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395](https://preview.redd.it/avlnylqo3m0h1.jpg?width=640&crop=smart&auto=webp&s=ab87546b8f29434c26ea746f02c95cb3a8387b73)
2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395
A 2021 IWC Portofino Chronograph White, a 42mm watch in excellent condition.
- Condition: Excellent condition with minimal signs of wear
- Case size: 42mm diameter
- Shipping method: Fedex
- Insurance included: true
![[WTS] 2015 IWC Portofino Chronograph | Complete set | Cheapp](https://preview.redd.it/834ueh548e0h1.jpg?width=640&crop=smart&auto=webp&s=8b07b0cbb7d1b67b883882b51b807043d94b7134)
2015 IWC Portofino Chronograph | Complete set | Cheapp
This Portofino is a timeless classic — elegant, refined, and versatile. The chronograph adds useful functionality without detracting from the dress-watch feel, making this a great addition for both daily wear and special occasions.
- Condition: Good pre-owned
- Case Size: 42mm
- Movement: IWC automatic chronograph
- Includes: Original IWC box, IWC warranty card, stainless steel mesh bracelet
![[WTS] 2018 IWC Portofino Chronograph 42mm Ref IW391008 | Box & Papers](https://preview.redd.it/zvw2lh1l670h1.jpg?width=640&crop=smart&auto=webp&s=5e0cb819c83a4882ea80c14c40981fe98e0e457b)
2018 IWC Portofino Chronograph 42mm Ref IW391008 | Box & Papers
a classy IWC Portofino Chronograph in 42mm size with black dial and automatic movement
- Condition: good preowned condition with normal wear
- Movement Type: Automatic
- Power Reserve: 44 hours
- Case Size: 42mm diameter
![[WTS] 2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995](https://preview.redd.it/zhn4zh2tp40h1.jpg?width=640&crop=smart&auto=webp&s=0309cf974b243bb32197abac2e13781dd87c113a)
2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995
This is a brand new IWC Portofino Chronograph Black with a 39mm case size, featuring a chronograph function.
- Condition: New condition
- Case size: 39mm diameter
![[WTS] 2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995](https://preview.redd.it/791i8rt4lqzg1.jpg?width=640&crop=smart&auto=webp&s=20352f0dafacfc58f44f626b1fd2f294eb2bd818)
2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $5,995
Up for sale is a new IWC Portofino Chronograph Black, a 39mm watch with chronograph functionality.
- Condition: New condition
- Year: 2025
- Case size: 39mm
- Contents: Watch,Box,Travel Case,International Warranty Card,Instructions Manual