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

Reference IW4590-09

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

About this watch

The IWC IW4590-09 Portofino Automatic Moon Phase 37 Red Gold / Diamond / Silver is a stunning piece that marries elegance with functionality. With a round case crafted from red gold, this watch exudes luxury from every angle. The gem-set bezel adds a touch of glamour, making it not just a timepiece but a statement accessory. The silver dial is adorned with gem-set indexes that catch the light beautifully, ensuring that you’ll always stand out in a crowd. Measuring 37.00 mm in diameter and standing 11.00 mm tall, the watch is perfectly sized for both men and women. It strikes an ideal balance between boldness and subtlety, making it comfortable to wear all day long. The watch’s slim profile means it fits seamlessly under a shirt cuff or dress sleeve, enhancing its versatility. The IW4590-09 boasts the IWC caliber 35800, a self-winding movement that is both reliable and efficient. It features a 42-hour power reserve, meaning you can take it off for a couple of days without worrying about it losing time. With a frequency of 28,800 vibrations per hour, precision is guaranteed. One of the standout features of this watch is its moonphase indicator, elegantly displayed at the 12 o'clock position. This complication is not just for show; it serves a practical purpose for those who enjoy stargazing or have a penchant for astrology. It's like having a little piece of the cosmos on your wrist! Protected by a sapphire crystal, the dial is resistant to scratches and impacts, ensuring that your watch remains pristine even with daily wear. Sapphire glass is known for its clarity and durability, making it an excellent choice for luxury watches. With a water resistance of 30 meters, the IW4590-09 can handle minor splashes and rain. However, it's not suitable for swimming or diving, so it’s best to keep it dry during water-related activities.

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Key Features

IWC caliber 35800 self-winding movement
42-hour power reserve
Sapphire crystal dial protection
Moonphase indicator complication
30-meter water resistance
Red gold case and gem-set bezel
37.00 mm diameter, 11.00 mm height

Specifications

Brand

IWC

Family

Portofino

Model

Portofino Automatic Moon Phase 37 Red Gold / Diamond / Silver

Reference

IW4590-09

Movement

35800

Movement Features

Hours, Minutes, Seconds
Moonphase

Case

Red Gold 37mm

Dial Color

Silver

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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