English: Seiko SBDX001 Marinemaster Automatic Professional Diver's 300 m (helium safe/for mixed-gas rated tool watch suitable for professional saturation diving). It is equipped with a special L-shaped gasket and one-piece case to render it proof against helium gas. This high-end Seiko diving watch has a high beat rate (28,800 BPH = 4 Hz) 8L35 automatic movement with 26 jewels that features a 50 hour power reserve, manual winding and a hack function (stopping the movement of the second hand).
{{Information |Description ={{en|1=Seiko SBDX001_diver's 300M Marinemaster diving watch. The watch features a high-end 8L35 automatic movement with 26 Jewels and a 50 hour power reserve. Accuracy easily matches certified chronometer levels. For example