James Caan wears an unidentified watch

Sonny Corleone doesn't think before he acts. That's his whole problem, and it kills him. James Caan plays him in The Godfather (1972) as the eldest son who runs hot on everything — his temper, his appetites, his loyalty. When Vito gets shot, Sonny takes over the family and starts a war he can't finish. Coppola lets Caan improvise, and Caan fills every scene with kinetic energy, from smashing Carlo against a garbage can to pacing the compound like a caged animal. The tollbooth ambush, when it comes, is one of the most violent sequences in American cinema up to that point.

A gold watch is visible on Caan's wrist, but the make and model can't be determined from the available footage. For Sonny, a gold watch fits. He's the Corleone who lives loudest and dies youngest. Everything about him is conspicuous, including whatever's on his wrist.