IWC Portugieser IW3905-04

43.5mm · Stainless Steel · Caliber 89361 · 60m

Portuguese Yacht Club Chronograph 43.5 Boesch

Brand: IWC
Full reference: IW3905-04
Also written as: IW390504
Collection: Portugieser
Case diameter: 43.5mm
Case thickness: 14.5mm
Case material: Stainless Steel
Crystal: Sapphire
Water resistance: 60m
Caliber: 89361
Dial color: Brown

Related references — same collection

Shared specifications help discovery; these links do not assert a predecessor or successor relationship.

IWC

Portugieser

IW3905-02

43.5mmStainless Steel

IWC

Portugieser

IW3905-03

43.5mmStainless Steel

IWC

Portugieser

IW3905-07

43.5mmStainless Steel

IWC

Portugieser

IW390502

43.5mmStainless Steel

Compare specifications

Specification	IW3905-04	IW3905-02	IW3905-03	IW3905-07	IW390502
Case diameter	43.5mm	43.5mm	43.5mm	43.5mm	43.5mm
Case material	Stainless Steel	Stainless Steel	Stainless Steel	Stainless Steel	Stainless Steel
Water resistance	60m	60m	60m	60m	60m
Movement	—	—	—	—	Automatic
Caliber	89361	89361	89361	89361	89361
Power reserve	—	—	—	—	68 hours

Sources & record notes

Displayed specifications follow the most complete source record. Other source records are retained below; conflicting values are not silently combined. WatchBase.

WatchBase ↗ · 2026-09-22 11:51:26 JST

WatchBase · IWC IW3905-04

Original collection: Portugieser

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Corrections and data limitations