In Addition, the Seamaster was basically worn by serious Royal Navy officers, so it makes sense that Bond would use 1. He can have fictionally served as being a captain, but the Seamaster has true-lifetime historical worth. Tourbillons are fairly pervasive in watchmaking, but consistent-pressure mechanisms are difficult to manufacture https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/