Panerai Luminor Submersible has a long history of military frogman diving tools. Panerai Luminor Submersible 1950 uses a characteristic case with a bridge crown cover, and the bezel can be rotated. The design of small raised circles indexed by 5 minutes and large raised circles indexed by 15 minutes is derived from the Egyptian model of 1956. Like the rest of the case, the bezel is made of titanium, and the matte black ceramic is used for the scale on the ring. In addition to scratch-resistant ceramic oxide skin, the fine lines around the rim help prevent scratches from damaging bare parts.
The minute hand of Panerai Luminor Submersible 1950 and the luminous indicator on the bezel emit blue light, while other luminescent materials emit green light. Just look for blue and ignore green, so you can read the dive time faster. The second hand on the sub-dial also glows, so it can be used underwater to check whether the watch is still running.