What You Need to Know about Rotating Diver’s Watch Bezels

The bezel on a watch is important for a number of reasons. For one, it helps to protect the crystal from scratches. It also provides a way to track elapsed time, which can be helpful for divers (or anyone else timing an event). And, of course, it can add a bit of style to the watch.

That being said, today, we’re going to delve into the basics of a rotating diver’s watch bezel, discussing with you what there is to know about it:

What Is a Rotating Diver’s Watch Bezel?

A rotating diver’s watch bezel is a feature found on many dive watches. It is a ring that surrounds the watch face and can be rotated, and this bezel is used to track dive time and can be a useful tool for divers. The bezel on a dive watch is usually marked with dive time increments. The most common increment is one minute. Some bezels are also marked with depth increments or decompression stop times.

What Are the Two Main Approaches to Rotating Diver’s Watch Bezels?

There are two main approaches to rotating watch bezels: the unidirectional and the bidirectional. Unidirectional bezels can only be rotated in one direction, while bidirectional bezels can be rotated in either direction.

The unidirectional approach is the more traditional of the two and is typically found on dive watches. The main reason for this is that it helps to prevent the user from accidentally rotating the bezel while underwater, which could lead to miscalculations of their remaining air supply.

The bidirectional approach is newer and is often found on watches that are designed for other purposes, such as aviation or military use. The main advantage of this approach is that it allows the user to rotate the bezel in either direction, which can be helpful in certain situations.

Which approach is better is largely a matter of personal preference, and there are advantages and disadvantages to both. Ultimately, it is up to the individual to decide which type of bezel they prefer.

What’s the Difference between External and Internal Bezels?

Apart from unidirectional and bidirectional bezels, there are also internal and external bezels to account for.

External bezels are the most common type of bezel. They are typically made from stainless steel or another type of metal. External bezels can be polished or brushed, and some even have diamonds or other gemstones set into them.

Internal bezels are less common, but they do have some advantages over external bezels. First, they offer more protection for the face of the watch. Second, they can be made from a variety of materials, including ceramic, sapphire, and even wood. Internal bezels can also be decorated with engravings or other designs.


As you can see, bezels come in various shapes and implementations, and they all offer different uses, along with pros and cons, for each individual. Now, which type of rotating bezel you go for is really up to you. Whether you want one for the function or for the looks, or even both, that’s also up to you. Fortunately, the world of mods offers a huge selection of bezels, so if you’re not happy with one, you can always switch it around for something new!

Seiko Mods offers a wide variety of custom parts for Seiko watches. If you are looking for Seiko bezel inserts and the like in the UK, check out what we offer!

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