Strapped to his wrist in every scene of the film
link is an Omega Speedmaster Moonwatch on a black leather strap. But this isn't any Speedy. It's the 50th Anniversary
link Limited
link Series ref. 311.30.42.30.01.001. One key difference between this and a standard Speedmaster is the gilt hippocampus at the top of the dial with the year 1957 printed below as well as the Omega logo and wordmark in red. You don't see these often – and it took a lot of pausing and zooming to identify it here.