IWC · Portugieser
Strap for Portugieser Yacht Club Chronograph 43.5 Red Gold / Silver
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter44 mm
ReferenceIW3905-01 (aka: 3905-01, IW390501)
FamilyPortugieser
MovementIWC caliber 89361
Hours, Minutes, Small Seconds | Date | Chronograph, Flyback
CaseRed Gold
Straps for the Portugieser IW3905-01 (aka: 3905-01, IW390501)
Selected for the 20 mm lug width · workshop selection
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
Novonappa Black Strap — IWC Pilot Style€149
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
The Portugieser IW3905-01 (aka: 3905-01, IW390501), seen from the bench
The IWC Portugieser Yacht Club Chronograph IW3905-01 is a 43.5mm chronograph in 18k red gold featuring a 20mm lug width. It houses the caliber 89361 manual-wind movement with flyback function, 29 rubies, 4 Hz frequency, and 46-hour power reserve. Part of the Portugieser collection launched in 1939, this model combines classical elegance with technical sophistication and develops a natural patina over time.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only