Around 1940, Panerai workshop in Florence finished a new case. It was built for Italian Navy commando. This case was released on 1936 and was designed up a case which is called Radiomir. Radiomir was a luminescence that Panerai filed patent for. It makes dial bright and clear to be read under a dark situation. In this new Panerai Radiomir 1940, it has many new inventions and become more solid than before. In the new case, the lug is no longer a bold circle that is welded to the case because the lug like this will cut adrift from the case when commandos carried out attack missions underwater. But looking at a 1940 edition, we could find that the lug is more solid as it was made of steel that was also applied to the case.
There are other changes. Bracelet also changes and looks simple, and firm. In addition to lug, other changes finally shapes the case, and lead to the new case. Now the new profile seems to be not so bright. The winding crown is a little bigger, and the cylinder crown takes place of the original cone crown. It is approximately 17 mm thick, 2mm increase than the old one. Then Radiomir came to exist. Today the new case redisplay and the case is thinner. After years of development, Radiomir become mature.
Here we come to talk about the P.3000 movement. This movement is dependently developed by Panerai. Grand and complicated movement is visible through the see-through sapphire case back. P.3000 is manual winding movement and two barrels offer 3 days energy reserve. The rare, big balance wheel is set on this movement and works at a frequency of 3 Hz. P.3000 is also fitted with a delicate system that could jump forward or backward to adjust hour hand, so that you can adjust time setting without bothering the working movement.