IWC Portugieser Portugieser Constant-Force Tourbillon Double Moon Red Gold / Ardoise

Reference IW5901-01

IWC Portugieser Constant-Force Tourbillon Double Moon Red Gold / Ardoise

About this watch

The IWC IW5901-01 Portugieser Constant-Force Tourbillon Double Moon is a masterpiece that embodies luxury, precision, and innovation in horology. This stunning watch features a round case crafted from red gold, radiating elegance and sophistication. The sunburst finish on the grey dial adds depth and texture, catching the light beautifully. At the core of the IW5901-01 is the IWC Caliber 94800, a hand-wound movement that exemplifies precision engineering. This movement features a tourbillon escapement, a patented constant force mechanism, and a generous 96-hour power reserve. The watch also offers a double moonphase display and day/night indication, making it a multifunctional timepiece. With its unique design, intricate movement, and exclusive features, the IW5901-01 is a true standout in the world of horology.

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Key Features

IWC Caliber 94800 hand-wound movement
Tourbillon escapement with patented constant force mechanism
96-hour power reserve indicator
Double moonphase display
Day/night indication
Sapphire glass with scratch-resistance
30 meters water resistance

Specifications

Brand

IWC

Family

Portugieser

Model

Portugieser Constant-Force Tourbillon Double Moon Red Gold / Ardoise

Reference

IW5901-01

Movement

94800

Movement Features

Minutes, Hours, Small Seconds
Moonphase
Constant Force Mechanism, Tourbillon Escapement, Power Reserve Indicator

Case

Red Gold 46mm

Dial Color

Grey

Crystal

Sapphire

Water Resistance

Current Listings

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The IWC Portugieser Automatic 40 is a high-end watch featuring a silver dial and 40mm case size. It has a mechanical automatic movement and comes with various accessories.

Condition: Brand new, unworn, pristine condition
Case diameter: 40mm

Posted at

May 2, 2026, 7:36 AM

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FURTHER REDUCED IWC Portugieser Jubilee Ref. 5441 – 18k Rose Gold – Limited Edition 006/500

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This IWC Portugieser Jubilee Ref. 5441 is a limited edition of 500 pieces produced in rose gold to celebrate the 125th anniversary of International Watch Company. It features a classic design language inspired by the original 1930s models, including a silver dial and manual-winding IWC Caliber 9828 movement.

Condition: Overall very good vintage condition, minor scuffing around the ~10 o'clock area on the crystal
Case Size: ~42 mm
Diameter: ~42 mm
Movement: IWC Caliber 9828, manual wind

Posted at

Apr 28, 2026, 9:28 PM

Active

View listing on r/WatchExchange

2020 IWC Portugieser Yacht Club "Orlebar Brown" - IW390704 - Full Set Priced to Fly

IWC - IW390704 · $7,500

A beautiful summer timepiece by IWC, the Portugieser Yacht Club Chronograph Edition 'Orlebar Brown' has a fresh and crisp aesthetic while maintaining its classic iconic design.

Condition: great preowned condition with minor signs of wear throughout the case, caseback, case sides, bracelet, and clasp
Year: 2020
Case size: 44mm
Crystal type: sapphire

Posted at

Apr 27, 2026, 7:20 PM

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IWC Portugieser Chronograph IW371624 Dune Dial Full Set

IWC - IW371624 · $7,497

This pre-owned IWC Portugieser Chronograph features a stainless steel case with a dune dial and black alligator strap. The watch comes in a full set, including box, papers, and original contents.

Condition: Very good
Case size: 41 mm
Case material: Stainless steel

Posted at

Apr 27, 2026, 9:52 AM

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IWC Portugieser Regulateur. IW544401. Box, Papers...

IWC - IW544401 · $6,600

IWC Portugieser Regulateur for sale, complete with box and papers.

Box: true
Papers: true

Posted at

Apr 25, 2026, 11:42 AM

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

IWC - IW358312 · $7,000

This IWC Portugieser Automatic 40 is a brand new timepiece with a silver dial and 40mm case. It features an automatic movement and comes with various accessories such as a box, manual, warranty booklet, microfiber cloth, link tools, and digital transferable warranty.

Condition: Brand new, unworn
Case size: 40mm diameter

Posted at

Apr 25, 2026, 9:21 AM

Active

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IWC Portugieser Chronograph IW371624 Dune Dial Full Set

IWC - IW371624 · $7,497

A pre-owned Portugieser Chronograph with a dune dial, featuring an automatic movement and a stainless steel case.

Condition: Very good
Case size: 41mm
Case material: Stainless steel
Movement type: Automatic

Posted at

Apr 20, 2026, 9:05 AM

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

IWC - IW504207 · $30,457

This listing is for an IWC Portugieser Tourbillon Mystere in White Gold, featuring a tourbillon mechanism. The watch has been lightly used and comes with the full set of box and papers.

Condition: Lightly Used
Material: White Gold
Comes With: Full set (box & papers)

Posted at

Apr 20, 2026, 5:38 AM

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