Worn by: George Clooney as Mr Butterfly
Reference: Omega Speedmaster
Brand: Omega
In this movie, George Clooney plays the main role (Mr Butterfly) and wears an Omega Speedmaster Professional on a leather strap. Clooney is an Omega ambassador for quite some years and has been spotted wearing various different models on and off the screen.
Source: https://www.fratellowatches.com/speedmaster-in-movies/