IWC Portofino Portofino Automatic 37 Stainless Steel / Ardoise / Milanese

Reference IW4581-10

About this watch

The IWC Portofino Automatic 37 embodies understated luxury with its sleek design and sophisticated features. The Ardoise dial changes with the light, offering a dynamic look that seamlessly transitions from day to night. The gem-set indexes add a touch of sparkle without overwhelming the design. This 37mm stainless steel case watch is perfect for both formal and casual occasions, thanks to its Milanese strap providing comfort and style. Powered by the IWC Caliber 35111 automatic movement, this timepiece offers reliability and a power reserve of 42 hours. With a water resistance of 30 meters, it's designed for everyday wear while looking classy.
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MSRP: $6,700
Market Price: $3,458

Key Features

  • IWC Caliber 35111 Automatic Movement
  • 37mm Stainless Steel Case
  • Sapphire Glass
  • Ardoise Dial with Gem-Set Indexes
  • Milanese Strap for Comfort and Style
  • 42-Hour Power Reserve
  • 30-Meter Water Resistance

Specifications

Brand
IWC
Family
Portofino
Model
Portofino Automatic 37 Stainless Steel / Ardoise / Milanese
Reference
IW4581-10
Movement
35111
Movement Features
  • Hours, Minutes, Seconds
  • Date
Case
Stainless Steel 37mm
Dial Color
Grey
Crystal
Sapphire
Water Resistance
30

Current Listings

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A IWC Portofino IW333101 is a timeless, ultra-thin dress watch in solid 18k yellow gold with a clean, minimalist dial and date window at 3 o'clock. It features understated luxury and ideal for both formal occasions and everyday wear.

  • Condition: Very Good
  • Case material: 18k yellow gold
  • Movement type: quartz
Posted at
Apr 25, 2026, 8:05 PM
Active
[WTS] IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $7,850

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IWC - IW459604 · $7,850
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  • Condition: great condition
  • Case diameter: 37.1 mm
  • Thickness: 11.3 mm
  • Dial color: burgundy/red
Posted at
Apr 25, 2026, 10:43 AM
Active
[WTS] 2019 IWC Portofino Chronograph Blue IW391036 42mm Full Set - $4,995

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IWC - IW391036 · $4,995
Up for sale is a IWC Portofino Chronograph Blue, a 2019 model featuring a chronograph function.

  • Condition: Excellent condition with minimal signs of wear
  • Case size: 42mm diameter
  • Shipping: Fully insured through Fedex within the USA
Posted at
Apr 25, 2026, 9:59 AM
Active
[WTS] 2025 NEW IWC Portofino Chronograph Black IW391404 39mm Full Set - $6,795

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IWC - IW391404 · $6,795
A 2025 IWC Portofino Chronograph Black, a high-end chronograph watch with sleek design.

  • Condition: New condition
  • Case size: 39mm
Posted at
Apr 25, 2026, 9:27 AM
Active
[WTS] 2019 IWC Portofino Chronograph Blue IW391036 42mm Full Set - $4,995

2019 IWC Portofino Chronograph Blue IW391036 42mm Full Set - $4,995

IWC - IW391036 · $4,995
A blue-dialed Portofino Chronograph from IWC, featuring a 42mm case size.

  • Condition: Excellent condition with minimal signs of wear
  • Case size: 42mm
  • Movement status: Running well
Posted at
Apr 23, 2026, 3:10 PM
Active
[WTS] IWC Portofino Ref. IW391030 Day-Date Chronograph on Bracelet

IWC Portofino Ref. IW391030 Day-Date Chronograph on Bracelet

IWC - IW391030 · $3,195
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  • Condition: Excellent, some light wear
  • Material: Stainless Steel
  • Function: Time, Day & Date
  • Dial color: Black
Posted at
Apr 23, 2026, 2:03 PM
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[WTS] IWC Portofino Automatic IW356504 18K Rose Gold 40MM Silver Dial Automatic

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IWC - IW356504 · $6,899
The IWC Portofino Automatic IW356504 is a 40mm watch crafted in elegant 18K rose gold, featuring an original brown leather strap and matching rose gold buckle. The warm rose gold case pairs beautifully with the original factory dial and hands.

  • Condition: Excellent/Near Mint
  • Case size: 40mm diameter
  • Movement: Automatic, IWC Movement
  • Dial: Original Factory Dial and Hands
Posted at
Apr 23, 2026, 12:08 PM
Active
[WTS] 2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395

2021 IWC Portofino Chronograph White IW391027 42mm Full Set - $4,395

IWC - IW391027 · $4,395
This is a 2021 IWC Portofino Chronograph White, featuring a chronograph function and a 42mm diameter case.

  • Condition: Excellent condition with minimal signs of wear
  • Size: 42mm diameter
  • Year: 2021
Posted at
Apr 19, 2026, 7:11 PM
Active