The "Orient Star 300M Diver" is a professional-spec diver's watch designed with the concept of "a genuine diver's watch that satisfies professionals." It features water resistance and waterproofing capabilities that withstand diving up to a depth of 300 meters, certified in compliance with JIS standards. This model is designed for saturation diving with professional specifications, utilizing a robust dedicated movement resistant to shocks and a helium gas-tight case without an air valve. It has gained popularity among professional divers for its authentic functionality.

The newly released "Orient Star 300M Diver New Model" further enhances practicality by incorporating new features to meet the needs of professional divers.

To prevent water ingress into the watch's interior, a large screw-down crown is used, and the crown is positioned at 4 o'clock to avoid hindering wrist movement underwater, emphasizing practicality during diving.

Other features include a power reserve indicator that allows you to check the remaining power at all times, a rotating bezel to easily recognize the elapsed time during dives, a luminous light for visibility in dark underwater environments, and sapphire glass with anti-reflective coating to enhance visibility. The watch is completed with safety features such as a double-lock function to prevent accidental detachment from the wrist and a slide adjuster for easy length adjustment of the band.