Both watches use Rolex’s Oyster-style clasp system and both offer on-the-fly adjustment. However, the Deepsea has a more complex setup with even more extension built in. From an engineering standpoint, the Deepsea clasp is the more advanced of the two. In this short article, we will go over the difference between the two

How the Submariner Glidelock Works

The Glidelock system on the Submariner allows the wearer to make small bracelet adjustments without removing links or using tools.

Inside the clasp, there are a series of notches that create multiple fit positions. When the bracelet section is lifted, the mechanism unlocks and allows the bracelet to slide forward or backward. This gives the wearer roughly 20mm of adjustment.

Once the desired fit is found, the bracelet is pressed back into place and locks securely.

This is especially useful during normal daily wear. If your wrist swells from heat, activity, or a workout, you can quickly loosen the bracelet for a more comfortable fit. Later, you can tighten it again just as easily.

How the Deepsea Clasp Works

Like the Submariner, the Deepsea allows you to lift the bracelet section and use the Glidelock for fine adjustment. This gives you the same kind of quick sizing flexibility for daily use.

The Deepsea also includes an additional fold-out extension built into the clasp called Fliplock. When this section is opened, the bracelet extends much farther than the standard Glidelock alone. This extra extension was designed so the watch could be worn over a diving suit. That is the original purpose. But even outside of diving, it shows just how much adjustment Rolex built into the bracelet.

The result is a clasp that feels more mechanical and more elaborate. When opened fully, the Deepsea clasp reveals more moving parts and a more complex hinge system than the Submariner.

What's the Main Difference?

The Submariner clasp is built for secure everyday comfort with a clean and practical Glidelock system. The Deepsea clasp gives you that same fine adjustment, but it also adds a larger extension system for much greater range. 

In other words, the Submariner focuses on convenience and comfort, while the Deepsea adds another level of functionality meant for serious dive use.

Final Thoughts

Both clasps are well-designed, secure, and highly functional. The Submariner’s clasp is one of the best everyday watch clasp systems on the market, thanks to its easy Glidelock adjustment and solid locking design.

The Deepsea takes that idea further by adding a larger extension feature that makes the clasp more versatile and more complex. It was built with professional diving in mind, but it also stands out simply because of how much engineering is packed into it.

To learn more about the difference in detail, watch this short Instagram Reel we published recently