The Ulysse Nardin Automatic 300M is a high-end diving watch from Ulysse Nardin, a brand of the Kering group, renowned since 1846 for its marine chronometers. Unveiled in 2018, the model belongs to a new line of diving watches called Diver Chronometer and is characterized by its titanium cases and its renowned technicality. The watch also stands out by its finishes, such as the small satin plate screwed to its left side that personalizes each copy by its serial number.