Robert Downey Jr. wears an Urwerk UR-110

Robert Downey Jr. plays Tony Stark in Spider-Man: Homecoming, and his civilian watch in the film is one of the more unusual pieces to reach a blockbuster wrist. This catalogued frame is a quiet moment with Pepper Potts and does not give a clear look at the watch, so the identification rests on documentation rather than this still.

The watch is an Urwerk UR-110 in rose gold. Urwerk's own account, reported by Professional Watches and Monochrome, is that Sony approached the independent maker in late 2016 because Downey, a serious collector, wanted Stark to wear one of their pieces, and the UR-110 with its rotating satellite hour modules was used for the character. Monochrome notes it can be glimpsed in the film itself. A clearer in-film wrist shot would confirm the exact variant.