IWC Portugieser Portuguese Yacht Club Chronograph 43.5 Boesch

Reference IW3905-04

About this watch

The IWC Portuguese Yacht Club Chronograph 43.5 Boesch is a masterpiece of horology, blending stunning design with advanced technology and embodying the spirit of nautical adventure. This limited-edition timepiece, released in 2016 and limited to just 150 units, tells a story of excellence and craftsmanship. With its classic yet sporty aesthetic, it's versatile enough for both formal and casual settings. The brown color scheme paired with the stainless steel case creates a sophisticated yet sporty look. The polished finish adds a touch of elegance, making it suitable for a yacht club dinner or a casual outing. At the heart of this watch lies the IWC caliber 89361, a self-winding flyback chronograph movement boasting a 68-hour power reserve and rapid timing sequences. The sapphire crystal offers scratch-resistance and durability, while the sturdy stainless steel case protects the movement from shocks and impacts. Comfort is key, with an adjustable leather strap that complements its overall aesthetic. This watch is perfect for anyone who enjoys the finer things in life, particularly those with a passion for sailing or nautical activities.

Buy Now on Jomashop

This is an affiliate link

Key Features

43.5mm Round Stainless Steel Case
Sapphire Crystal Scratch-Resistant and Durable
IWC Caliber 89361 Self-Winding Flyback Chronograph Movement
68-Hour Power Reserve and Rapid Timing Sequences
Water Resistance up to 60 meters
Brown Color Scheme with Polished Finish
Adjustable Leather Strap

Specifications

Brand

IWC

Family

Portugieser

Model

Portuguese Yacht Club Chronograph 43.5 Boesch

Reference

IW3905-04

Movement

89361

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph, Flyback

Case

Stainless Steel 43.5mm

Dial Color

Brown

Crystal

Sapphire

Water Resistance

Current Listings

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

Active

View listing on r/WatchExchange

[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

View listing on r/WatchExchange

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

Active

View listing on r/WatchExchange

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

Active

View listing on r/WatchExchange

IWC Schaffhausen Portugieser. Blue Hands/Indices. 40mm. IW358312. Card Included..

IWC Schaffhausen - IW358312 · $4,950

This IWC Portugieser is a gorgeous watch with an inhouse movement, available for sale. It features blue hands and indices on a 40mm case.

Case size: 40mm diameter
Movement type: inhouse

Posted at

Apr 19, 2026, 11:42 AM

Active

View listing on r/WatchExchange

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

IWC - 5441 · $13,249

A limited edition IWC Portugieser Jubilee Ref. 5441 in 18k rose gold produced to celebrate IWC's 125th anniversary, featuring a manual-winding movement and classic Portugieser design language.

Condition: Overall very good vintage condition, minor scuffing around the ~10 o'clock area on the crystal.
Case Size: ~42 mm
Dial Color: Silver
Movement Type: Manual winding

Posted at

Apr 18, 2026, 2:43 PM

Active

View listing on r/WatchExchange

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

IWC - IW358312 · $7,025

This IWC Portugieser Automatic 40 is a brand new timepiece with a silver dial and 40mm case size. It features an automatic movement and comes with all original accessories.

Condition: Brand new, unworn
Case size: 40mm
Movement type: Automatic

Posted at

Apr 18, 2026, 8:18 AM

Active

View listing on r/WatchExchange

IWC Portugieser Chronograph IW371624 Dune Dial Full Set

IWC - IW371624 · $7,497

This pre-owned IWC Portugieser Chronograph is a stainless steel timepiece with a dune dial on a black alligator strap, featuring an automatic movement.

Condition: Very good condition
Case diameter: 41mm
Movement type: Automatic

Posted at

Apr 13, 2026, 9:11 AM

Active

View listing on r/WatchExchange

IWC Portugieser Chronograph - 41mm - Gold Numerals - IW371604 ( new / 2024 )

IWC - IW371604 · $6,995

This IWC Portugieser Chronograph features a stainless steel case and gold numerals. It comes with all the original boxes, papers, booklets, and IWC Warranty Card.

Condition: unworn
Case size: 41mm diameter
Movement: In-House Calibre 69355

Posted at

Apr 2, 2025, 3:10 PM

Active

View listing on RolexForums