IWC Portofino Portofino Automatic Moon Phase 37 Red Gold / Diamond / Silver / Bracelet

Reference IW4590-10

About this watch

The IWC IW4590-10 Portofino Automatic Moon Phase 37 is a masterpiece of luxury watchmaking. This exquisite timepiece combines elegance, sophistication, and a touch of celestial charm with its red gold case, gem-set bezel, and moonphase indicator at 12 o'clock. The silver dial with gem-set indexes glimmers subtly against the backdrop, ensuring that the time is not only readable but also a feast for the eyes. Powered by the IWC caliber 35800 movement, this watch showcases precision and reliability with a self-winding mechanism and 42-hour power reserve. With a water resistance of 30 meters, it's perfect for daily activities, but best suited for casual strolls rather than underwater adventures. The combination of red gold and silver creates a harmonious look that complements any outfit, making this watch a standout choice for those who value luxury and craftsmanship.
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Key Features

  • IWC caliber 35800 movement with self-winding mechanism
  • Red gold case with gem-set bezel
  • Moonphase indicator at 12 o'clock
  • Silver dial with gem-set indexes
  • Water resistance of 30 meters
  • 42-hour power reserve
  • 37 mm diameter and 11 mm height

Specifications

Brand
IWC
Family
Portofino
Model
Portofino Automatic Moon Phase 37 Red Gold / Diamond / Silver / Bracelet
Reference
IW4590-10
Movement
35800
Movement Features
  • Hours, Minutes, Seconds
  • Moonphase
Case
Red Gold 37mm
Dial Color
Silver
Crystal
Sapphire
Water Resistance
30

Current Listings

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A 34mm automatic dress watch with a clean crystal, but needs servicing to run consistently.

  • Condition: Phenomenal for its age, light wear consistent with regular use
  • Crystal condition: clean
  • Caliber: IWC Cal 37521 (ETA 2892 based)
  • Service cost estimate: $100
Posted at
Jan 20, 2026, 3:57 PM
Active
[WTS] IWC PORTOFINO CHRONOGRAPH BLACK DIAL - IW391008 - VERY GOOD - BOX/PAPERS

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The IWC Portofino Chronograph features a sleek black dial, polished silver bezel, and classic black leather strap. It includes a 42mm steel case with an automatic chronograph movement. Perfect for both formal and casual occasions.

  • Condition: Very Good
  • Case diameter: 42mm
  • Dial color: black
  • Bezel material: silver
Posted at
Jan 18, 2026, 1:52 PM
Active
[WTS] This Watch Got Me Complimented By a Stranger…Which I Have to Sell It 😢 – IWC Portofino

This Watch Got Me Complimented By a Stranger…Which I Have to Sell It 😢 – IWC Portofino

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This IWC Portofino IW356517 features a crisp white dial, gold hands, and hour markers. It's perfect for formal events or everyday wear, with a classic and elegant design.

  • Condition: Excellent
  • Case Size: 42mm diameter
  • Materials: Gold hands and hour markers
Posted at
Jan 9, 2026, 1:08 PM
Active
IWC Portofino Automatic 40MM IW356303 Silver Dial

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IWC - IW356303 · $2,080
IWC Portofino Automatic 40MM IW356303 Silver Dial is a men's watch with a mechanical automatic movement.

  • Condition: 90%
  • Size: 40mm diameter
  • Case material: Stainless Steel
Posted at
Apr 8, 2025, 8:48 AM
Active
2024 IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

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IWC - IW516401 · $8,875
This IWC Portofino Hand-Wound Moon Phase features a silver-plated dial with a moon phase display, high-polished stainless steel domed bezel and case, and an exhibition caseback offering a clear view of the movement. It has an 8-day power reserve when fully wound and includes various functions such as hours, minutes, date, small seconds subdial, moon phase display, and power reserve indicator.

  • Condition: Mint
  • Case Size: 42mm
  • Material: stainless steel
  • Movement Type: hand-wound
Posted at
Apr 2, 2025, 5:33 PM
Active
IWC Portofino 18K Rose Gold Grey Dial Eight Days 45mm IW510104

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The IWC Portofino is a men's watch featuring a grey dial and 18K rose gold case, with a size of 45mm. It has a mechanical manual movement and functions include date and power reserve.

  • Condition: 90%
  • Case material: 18K Rose Gold
  • Movement type: Mechanical Manual
  • Size: 45mm
Posted at
Mar 6, 2025, 9:28 AM
Active
IWC Portofino Hand-Wound 8 Days Hand-Wound Black Steel 45mm IW510102 Strap

IWC Portofino Hand-Wound 8 Days Hand-Wound Black Steel 45mm IW510102 Strap

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The IWC Portofino Hand-Wound 8 Days is a pre-owned watch with a black steel case, featuring an IWC hand-wind movement and 45mm diameter. It comes with an IWC box, papers, and a brown leather strap.

  • Condition: Excellent
  • Case material: Stainless Steel
  • Crystal type: Sapphire
  • Movement type: Hand Wind
Posted at
Feb 28, 2025, 7:57 PM
Active
IWC Portofino Automatic White Dial 38mm IW353303

IWC Portofino Automatic White Dial 38mm IW353303

IWC - IW353312 · $2,275
The IWC Portofino Automatic White Dial is a 38mm men's watch with a mechanical automatic movement and date function, housed in a stainless steel case.

  • Condition: 90%
  • Case size: 38mm
  • Movement type: Mechanical Automatic
Posted at
Feb 16, 2025, 8:46 AM
Active