IWC Portofino Portofino Automatic Day & Night 37 Red Gold

Reference IW4591-02

About this watch

The IWC Portofino Automatic Day & Night 37 Red Gold is a masterpiece of watchmaking that balances elegance and functionality. Its luxurious red gold case, mother of pearl dial, and gem-set bezel create a harmonious blend of color and texture. The automatic movement provides precision and reliability, while the Day & Night feature allows for convenient timekeeping across different time zones. With its comfortable size and classic feel, this watch is perfect for both formal events and casual outings. Whether dressing up or enjoying a day out, the IW4591-02 is sure to turn heads and spark conversations. Its luxurious materials, precise movement, and thoughtful features make it a standout choice for anyone looking to elevate their accessory game.
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Key Features

  • Red gold case
  • Mother of pearl dial
  • Gem-set bezel
  • Automatic movement
  • Day & Night feature
  • 42-hour power reserve
  • 28,800 vibrations per hour

Specifications

Brand
IWC
Family
Portofino
Model
Portofino Automatic Day & Night 37 Red Gold
Reference
IW4591-02
Movement
35700
Movement Features
  • Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable)
Case
Red Gold 37mm
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 $8,200

IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $8,200

IWC - IW459604 · $8,200
This IWC Portofino Automatic Moon Phase Year of the Snake is a 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, while the beautifully executed moon phase display at 12 o'clock adds a sophisticated and poetic touch.

  • Condition: Great condition
  • Case size: 37.1 mm
  • Thickness: 11.3 mm
  • Dial color: Burgundy/red
Posted at
Mar 28, 2026, 12:32 PM
Active
[WTS] 2018 IWC Portofino Chronograph 42mm IW391022 - Full Set

2018 IWC Portofino Chronograph 42mm IW391022 - Full Set

IWC - IW391022 · $10,300
2018 IWC Portofino Chronograph in excellent condition, featuring a 42mm case size.

  • Movement: automatic
  • Water Resistance: 100m
Posted at
Mar 27, 2026, 3:31 PM
Active
[WTS] IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $8,200

IWC Portofino Automatic Moon Phase Limited Edition Year of the Snake Ref IW459604 37mm Full Kit 2025 $8,200

IWC - IW459604 · $8,200
A limited edition IWC Portofino Automatic Moon Phase watch with a striking and elegant design, featuring a moon phase display and a bespoke snake-shaped solid gold rotor.

  • Condition: Great condition
  • Case size: 37.1mm diameter
  • Thickness: 11.3mm
  • Water resistance: ~50m (5 bar)
Posted at
Mar 21, 2026, 3:36 PM
Active
[WTS] IWC Portofino Automatic Moon Phase 40mm Blue Dial IW459402 Complete

IWC Portofino Automatic Moon Phase 40mm Blue Dial IW459402 Complete

IWC - IW459402 · $4,950
This IWC Portofino Automatic Moon Phase features a blue dial in a 40mm case. It includes inner & outer IWC boxes, manual, and warranty card.

  • Condition: Very good, with a few microscratches on the caseback and clasp
  • Box set included: Yes
  • Warranty expiration year: 2028
Posted at
Mar 20, 2026, 10:23 AM
Active
[WTS] IWC Portofino Automatic Moon Phase 40mm IW459402

IWC Portofino Automatic Moon Phase 40mm IW459402

IWC - IW459402 · $5,750
2020 IWC Portofino Automatic Moon Phase in 40mm stainless steel with blue dial and moon phase display.

  • Condition: Very Good to Excellent pre-owned
  • Movement: automatic movement
  • Material: stainless steel
  • Case size: 40mm
Posted at
Mar 16, 2026, 8:11 PM
Active
[WTS] IWC Portofino Chronograph 39mm Black Dial IW391404

IWC Portofino Chronograph 39mm Black Dial IW391404

IWC - IW391404 · $5,750
2021 IWC Portofino Chronograph in 39mm stainless steel features a stunning, classic combination of black dial with gold hands and markers. A slim automatic chronograph, beautifully proportioned dress watch.

  • Condition: Very Good to Excellent pre-owned
  • Year: 2021
  • Material: stainless steel
  • Size: 39mm diameter
Posted at
Mar 16, 2026, 2:22 PM
Active
IWC Portofino Automatic 40MM IW356303 Silver Dial

IWC Portofino Automatic 40MM IW356303 Silver Dial

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

2024 IWC Portofino Hand-Wound Moon Phase Silver Steel FULL SET MINT IW516401

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

IWC Portofino 18K Rose Gold Grey Dial Eight Days 45mm IW510104

IWC - IW510104 · $8,190
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