Worn by: Elizabeth Debicki as Princess Diana
Reference: Cartier Tank
Brand: Cartier
The Crown is a historical drama television series that tells the story of Queen Elizabeth's reign. The series showcases the Tank Louis, which was a signature watch of Princess Diana. The classic and fancy design complements perfectly with the royal theme. Princess Diana often wore this beautiful black leather strap watch for casual occasions. The use of it shows the long-lasting charm of the brand and its connections to important figures in history.

Source: https://juraganjam.com/articles/cartier-watches-in-movies-behind-the-scenes