The Omega Seamaster is a line of automatic winding mechanical diving watches from Omega with a history that can be traced back to the original water-resistant dress-style watch released in 1948. The Seamaster collection is perhaps best known today for the Seamaster Diver Professional 300m model that has been worn in the James Bond movie franchise since 1995. Originally conceived as a dressy, water-resistant timepiece, the Omega Seamaster has evolved to a robust sports watch line, typically with a stainless steel case, robust water resistance, and an official chronometer-certified movement within. The Diver Professional 300m is most famous for its "train-track" five link steel bracelet, its helium release valve at the 10:00 position, the wave pattern dial on certain model generations, and the skeletonized handset. The current model range is split into separate lines of Seamaster models: the Aqua Terra line serves as the everyday sports watch model, the Diver Professional 300m line is the successor to the 1995 James Bond watch, the Planet Ocean line serves as the heavier duty dive watch line, and the Seamaster 300 (not to be confused with the Diver 300m) and Railmaster lines are modern versions of those iconic models from Omega's past. In 2019, three specially made experimental watches dubbed Omega Seamaster Planet Ocean Ultra Deep Professionals survived a 10,928 meter dive to the bottom of the Mariana Trench affixed to the bathyscaphe Limiting Factor, setting a new world record at the time as deepest dive watch by 12 meters.