Worn by: Tom Hardy as Ricki Tarr
Reference: Omega Speedmaster
Brand: Omega
Ricki Tarr, a British intelligence officer, wears an Omega Speedmaster Professional in this Cold War espionage thriller set in the early 1970s. The watch is most clearly visible in a kitchen table scene where Tarr sits with his elbows up and sleeves pulled back. The Speedmaster was an appropriate period-correct choice, as the watch would have been recently immortalized as the "Moonwatch" after NASA astronauts Neil Armstrong and Buzz Aldrin wore theirs during the July 1969 moon landing—just a few years before the film's setting. Forum discussions noted that the props department made an accurate choice, as Speedmaster Pros were indeed notably large compared to most other watches of the early 1970s.
Source: https://www.fratellowatches.com/speedmaster-in-movies/