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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The IWC Portofino Chronograph 39 IW391503 is a 39 mm stainless-steel automatic chronograph with a white dial and matching five-link bracelet. It combines IWC’s calibre 69355, a 46-hour stated power reserve and a 30-minute chronograph with 5 bar water resistance.
What is the IWC Portofino Chronograph 39 IW391503?
IW391503 is the steel-bracelet version of IWC’s Portofino Chronograph 39. IWC specifies a white dial, a 39 mm case and a 13 mm case height. The case and bracelet are stainless steel. IWC’s product page identifies the model as automatic and lists water resistance at 5 bar.
Specifications
| Specification | IWC-listed detail |
|---|---|
| Reference | IW391503 |
| Case diameter | 39 mm |
| Case height | 13 mm |
| Case and bracelet | Stainless steel |
| Dial | White |
| Movement | Automatic, IWC-manufactured calibre 69355 |
| Power reserve | 46 hours |
| Frequency | 28,800 vph (4 Hz) |
| Components and jewels | 205 components; 27 jewels |
| Chronograph range | Up to 30 minutes, according to IWC’s launch announcement |
| Water resistance | 5 bar |
Calibre 69355 and chronograph function
IWC says the watch is powered by its in-house 69355 calibre. The launch announcement describes it as a column-wheel chronograph movement and states that it measures stop times up to 30 minutes. The movement can be viewed through the sapphire-glass case back. IWC lists a 46-hour power reserve, 28,800 vph (4 Hz), 205 components and 27 jewels.
Bracelet and strap changes
IWC introduced IW391503 as the first Portofino Chronograph 39 fitted with a five-link stainless-steel bracelet. The launch announcement describes an integrated quick-change system for switching to another option, including traceable Swiss calf leather. IWC says replacement straps or bracelets can be purchased, but the specific availability and fitment of any replacement item are not established here. Confirm compatibility with IWC or an authorized retailer before ordering.
Water resistance and warranty
The manufacturer lists water resistance of 5 bar. Treat that as the published specification rather than a recommendation for a particular water activity; the available product information does not set out activity-specific guidance.
IWC offers a complimentary six-year extension to the standard two-year International Limited Warranty, for coverage of up to eight years. The extension requires registering the watch in My IWC care while the original two-year warranty is still active. Check IWC’s current warranty terms for the applicable conditions.
Quick Recap
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- Length : 19.5cm
- Material : Nylon
- Width: 20/21/22mm
- Packaging: 1pcs
- Compatible With IWC Portuguese Portofino Le Petit Prince Series
Official product information
- IWC Portofino Chronograph 39 IW391503 product page — product specifications and warranty information.
- IWC launch announcement — column-wheel chronograph, 30-minute timing range, movement visibility and bracelet quick-change details.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
