Referring to the source of the diving watches, I believe everyone should have heard about it. Omega, Rolex and Blancpain all played the important roles. Referring to the antique diving watches, many people will think of the Submariner ref.6204. Although majority of watch lovers recognize that the modern diving watches were officially launched in 1953, many watch brands had made much efforts on diving watches.
In 1922, Rolex launched a fully enclosed waterproof watch which looked just like a closed jar. Meanwhile, the perfect Rolex copy watch was troublesome to wind. You should remove the case to wind the wristwatch. Therefore, Rolex upgraded the crown. In 1926, Rolex launched the first watch with Oyster case and screw-in back that was water resistant and dust resistant.
In 1932, the Marine that Omega launched completed the test under Lake Geneva. The Arabic numerals hour markers fake Omega looked quite different with modern diving watches due to the rectangle case. While the famous Omega Seamaster 300 was launched in 1957 which was exactly the first professional diving watch of Omega.