Actor James Marsden spotted wearing a IWC

The Monaco Grand Prix paddock has long served as an unofficial watch fair for the wealthy and well-connected, and the 2023 edition was no exception. Among the celebrities making their way through the pit lane, actor James Marsden — known for his roles in Westworld, Enchanted, and Sonic the Hedgehog — caught the eye not just for his relaxed polo-and-denim combination, but for the IWC Portofino Chronograph with green dial riding quietly on his left wrist.

The IWC Portofino Chronograph reference IW391404 — the most likely candidate based on the visible green sunburst dial, column-wheel chronograph pushers at 2 and 4 o'clock, and dark green alligator-embossed leather strap — houses IWC's in-house calibre 69370. This self-winding movement beats at 28,800 vph, delivers a 46-hour power reserve, and drives a flyback-style chronograph via a column wheel and vertical clutch. The 42mm stainless steel case maintains the Portofino line's signature thin-bezel, clean-lug aesthetic, while the sunburst olive-green dial adds warmth and depth rarely found in chronograph dials at this price tier.

The green dial variant, introduced as part of IWC's 2022–2023 range expansion, quickly built a reputation among collectors as one of the brand's more desirable Portofino configurations. The colour occupies a sweet spot — distinctive enough to generate interest, restrained enough to avoid novelty status. In a market increasingly saturated with green dials, IWC's execution here stands out for its tonal sophistication rather than shock value.

Marsden's choice reflects a broader pattern among his generation of Hollywood actors who gravitate toward Swiss watchmaking that rewards knowledge without demanding attention. The Portofino Chronograph is not a watch that announces itself across a room, yet it carries genuine mechanical substance and a design language rooted in 1980s Italian coastal elegance — an apt companion for the streets of Monte Carlo.

At retail, the stainless steel Portofino Chronograph in green sits around $8,700 USD, with grey market pricing tracking close to list — a sign that demand remains healthy without tipping into speculation. For a certified pre-owned market increasingly dominated by sports references, the Portofino Chronograph offers an accessible entry into IWC's in-house chronograph movement with room to appreciate.