As usual, the focus was on the Submariner diver's watch. The invention of the Oyster case in 1926 marked a major breakthrough in waterproof watches. Although Rolex launched the Submarine - a predecessor of the Submariner - in 1922, before the Oyster case was released, it was the first step for Rolex in creating a sealed watch case that was also user friendly and convenient. One of them is the technique of screwing the bezel, case back and winding crown down against the middle case, ensuring the case is hermetically sealed. She went on to become the first British woman to achieve that distinction, and as her fame grew, so did that of the Rolex Oyster case she wore.

Source: The Standard October 29, 2020 19:41 UTC