A Rolex Glidelock Clasp patent application was published in 2008, describing an innovative new clasp that we have all come to admire, with it’s three calibration points for optimal length adjustment. This allows for micro-comfort when wearing the Deepsea or Submariner Ceramic watch over a diving wetsuit, or adjusting for changes in wrist size due to temperature or weight fluctuations.
The first mechanism in the Glidelock Clasp is located when lifting the middle flap. Once lifted, a second adjustment location is found, but without the spring-operated toggle lever system (the middle flap will open anytime the locking cover and/or the clasp is opened). In order to open the middle flap, the user has to lift the flap past the natural point of equilibrium, causing the clasp to automatically open itself as the spring function activates. The Oyster bracelet can then be slid out or in, to lengthen or to shorten, allowing for a precise fit. Once adjusted, the center section closes to lock the bracelet at the precisely chosen length. The Glidelock Clasp utilizes the ultimate mechanical system available from a functional point of view, and at all expense necessary. It is very unwise to tamper with, or modify the complicated Rolex Glidelock clasp, as it would be a costly mistake.