Jason Bateman wears an IWC Portofino

Jason Bateman plays Conrad Valmont in The Longest Week, a fortyish heir who has lived off his family's hotel money while never finishing a novel, and who loses the arrangement when his parents divorce and cut him off. On his wrist is an IWC Portofino Chronograph, from the brand's most formal, dress-oriented line.

It is on him from the opening scenes, though rarely held in a clear shot. One watch publication identified it specifically: a Portofino Chronograph with a white dial, reference IW3910. That documents the chronograph variant rather than leaving it a guess, though it rests on a single watch source, so the call stays Likely.

The Portofino is IWC's dress line, slim and uncomplicated, made to read formal without ornament.