The IWC Portofino Chronograph 39 Ref. IW391503 combines the timeless elegance of the Portofino collection with refined chronograph functionality in a compact 39 mm stainless steel case. Its white dial is paired with a stainless steel bracelet, creating a clean and sophisticated appearance. Measuring 13 mm in height, the watch features a convex sapphire crystal with antireflective coating on both sides and offers 5 Bar water resistance. The chronograph function displays elapsed hours, minutes, and seconds, while central hacking seconds allow precise time setting.

The watch is powered by the IWC-manufactured Calibre 69355, an automatic self-winding movement operating at 28,800 Vph (4 Hz) with a 46-hour power reserve. Comprising 205 components and 27 jewels, the movement is visible through the synthetic sapphire crystal case back, showcasing IWC's mechanical craftsmanship. With its balanced 39 mm proportions, classic white dial, stainless steel bracelet, and sophisticated chronograph movement, the Ref. IW391503 offers a refined expression of the Portofino design. The watch is eligible for up to 8 years of warranty through My IWC Care.