IWC Portugieser Portugieser Constant-Force Tourbillon Double Moon Platinum / Blue

Reference IW5901-03

About this watch

The IWC Portugieser Constant-Force Tourbillon Double Moon is a masterclass in horological innovation, showcasing IWC's commitment to precision engineering and timeless design. The platinum case exudes opulence with its 46mm diameter and 13.40mm height, while the sunburst blue dial radiates elegance and makes time-telling effortless. A robust sapphire crystal protects the watch, ensuring a scratch-resistant finish that shines brightly in varying lighting conditions. Powered by the IWC-manufactured caliber 94800, this hand-wound movement is a testament to horological excellence, featuring a patented constant force mechanism and tourbillon escapement for improved accuracy and performance. The IW5901-03 boasts an impressive power reserve indicator, double moonphase display, and day/night indication feature, making it a truly unique timepiece that combines beauty and functionality.
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Key Features

  • 46mm platinum case
  • IWC-manufactured caliber 94800 movement
  • Patented constant force mechanism
  • Tourbillon escapement
  • 96-hour power reserve
  • Double moonphase display
  • Day/night indication feature

Specifications

Brand
IWC
Family
Portugieser
Model
Portugieser Constant-Force Tourbillon Double Moon Platinum / Blue
Reference
IW5901-03
Movement
94800
Movement Features
  • Minutes, Hours, Small Seconds
  • Moonphase
  • Constant Force Mechanism, Tourbillon Escapement, Power Reserve Indicator
Case
46mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
30

Current Listings

[WTS] 2021 IWC Portugieser Chronograph Blue IW371606 41mm Full Set - $5,395

2021 IWC Portugieser Chronograph Blue IW371606 41mm Full Set - $5,395

IWC - IW371606 · $5,395
A 2021 IWC Portugieser Chronograph Blue in excellent condition, featuring a 41mm case and equipped with a chronograph function.

  • Condition: Excellent condition with minimal signs of wear
  • Case Size: 41mm diameter
  • Year: 2021
Posted at
May 26, 2026, 1:08 PM
Active
[WTS] IWC Portugieser Chronograph IW371624 Dune Dial 41mm Full Set 2024

IWC Portugieser Chronograph IW371624 Dune Dial 41mm Full Set 2024

IWC - IW371624 · $6,897
A pre-owned IWC Portugieser Chronograph Ref. IW371624 features a stainless steel case, dune dial on black alligator leather strap, and automatic chronograph movement. It is accompanied by its original box, papers, and contents.

  • Condition: Very good condition with light signs of normal wear
  • Case size: 41mm diameter
  • Case material: Stainless steel
  • Movement type: Automatic chronograph
Posted at
May 25, 2026, 10:02 PM
Active
[WTS] REDUCED TO SELL:  1993 IWC Portugieser Jubilee Ref. 5441 – 18k Rose Gold – Limited Edition

REDUCED TO SELL: 1993 IWC Portugieser Jubilee Ref. 5441 – 18k Rose Gold – Limited Edition

IWC - 5441 · $11,999
A limited edition 1993 IWC Portugieser Jubilee Ref. 5441 in 18k rose gold, one of only 500 produced to celebrate International Watch Company's 125th anniversary.

  • Condition: very good vintage condition, minor scuffing around the ~10 o'clock area on the crystal
  • Case size: ~42 mm
  • Dial material: silver
  • Movement type: manual winding
Posted at
May 25, 2026, 8:59 PM
Active
[WTS] IWC Portugieser Automatic (IW500109)

IWC Portugieser Automatic (IW500109)

IWC - IW500109 · $5,500
This IWC Portugieser Automatic features a black dial on a black leather strap, is discontinued and in very good condition. It comes with box, booklets, and warranty card dated January 2011.

  • Condition: very good with a few light marks
  • Case Material: Stainless Steel
  • Bracelet Material: Leather
  • Crystal: Sapphire
Posted at
May 25, 2026, 8:58 AM
Active
[WTS] 2022 IWC Portugieser Chronograph Green IW371615 41mm Full Set - $5,995

2022 IWC Portugieser Chronograph Green IW371615 41mm Full Set - $5,995

IWC - IW371615 · $5,995
A 2022 IWC Portugieser Chronograph Green, a chronograph watch with green dial. It features a 41mm case and is in excellent condition.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2022
  • Case size: 41mm
Posted at
May 24, 2026, 11:51 AM
Active
[WTS][US] IWC Portugieser Automatic 40 - Silver Dial - 40mm - IW358312 - BRAND NEW

[US] IWC Portugieser Automatic 40 - Silver Dial - 40mm - IW358312 - BRAND NEW

IWC - IW358312 · $6,900
This IWC Portugieser Automatic 40 is a mechanical watch with a silver dial and 40mm case. It features a digital transferable warranty until 12/2025.

  • Condition: Brand new, unworn
  • Case size: 40mm
Posted at
May 23, 2026, 5:09 AM
Active
[WTS] 2022 IWC Portugieser Chronograph Green IW371615 41mm Full Set - $5,995

2022 IWC Portugieser Chronograph Green IW371615 41mm Full Set - $5,995

IWC - IW371615 · $5,995
This is a 2022 IWC Portugieser Chronograph Green, a high-end chronograph watch with a 41mm case size.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2022
  • Case size: 41mm
Posted at
May 21, 2026, 10:10 PM
Active
[WTS] IWC Portugieser Chronograph IW371624 Automatic Dune Dial 2024 41mm Full Set

IWC Portugieser Chronograph IW371624 Automatic Dune Dial 2024 41mm Full Set

IWC - IW371624 · $6,997
This is an IWC Portugieser Chronograph with a stainless steel case, dune dial on black alligator strap, and automatic movement.

  • Condition: Very good
  • Case size: 41mm diameter
  • Material: Stainless steel
  • Movement: Automatic
Posted at
May 18, 2026, 8:53 AM
Active
[WTS] IWC Portugieser Tourbillon Mystere, White Gold IW504207 ♦️Lightly Used Undated♦️

IWC Portugieser Tourbillon Mystere, White Gold IW504207 ♦️Lightly Used Undated♦️

IWC - IW504207 · $30,300
This IWC Portugieser Tourbillon Mystere features a white gold case and is in lightly used condition. It comes with a full set, including the box and papers.

  • Condition: Lightly Used
  • Case material: White Gold
  • Movement: Calibre 65
Posted at
May 18, 2026, 4:42 AM
Active