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At every price point, a secure fit on the wrist is one of the most important qualities of a good timepiece. To ensure a precise fit, there are several types of watch clasps to choose from, ranging from the simple tang buckle to the complex double deployant clasp. Here we explain the advantages of each variant and which straps and bracelets they suit best.
Security, Ergonomics and Aesthetics: The Watch Clasp
Most of our articles focus on the top of the wrist: on beautiful designs, impressive complications and fine materials. But even the most spectacular watch is of little use if it feels uncomfortable to wear or, in the worst case, suddenly drops to the ground. A high-quality watch clasp solves both problems by combining good ergonomics with a secure hold, which is what makes a carefree experience on the wrist possible in the first place. The visual aspect matters as well: like the right tie with a suit, the clasp and the strap underscore the overall look of the masterpiece and shape its character enormously. A closer look at the underside of the wrist is therefore essential.
Tang Buckle: A Simple Classic at Every Price Point
The simplest and probably best-known of all closures consists of two parts: a pointed pin, or tongue, and a movable frame, which together form the buckle and represent the heart of the tang buckle. It is used on all non-metal straps, including leather and rubber as well as textile and synthetic straps. Each of these has several holes that allow it to be adjusted to the wearer's wrist size. Despite its simplicity, the tang buckle is by no means limited to affordable price ranges: affordable manufacturers such as Bruno Söhnle, as well as luxury brands such as Glashütte Original, rely on the classic for many of their models.
One reason for this popularity is the timelessness of the tang buckle. Its simple construction goes hand in hand with a traditional character that looks particularly good on dress watches with leather straps. From a practical standpoint, the flexible adjustability is a clear plus, offset by the drawback that the strap is bent frequently. With leather straps in particular, this leads to visible wear with creases, so the strap's lifespan is usually limited to a few years.
Practical on Metal Bracelets: The Single Folding Clasp
Designed specifically for metal bracelets and usually made of stainless steel, the single folding clasp (often also called a fold-over clasp) is especially popular in the entry-level to mid-range segment. At the core of its design is a single metal blade that permanently connects both ends of the bracelet and opens in one set direction. Two variants of this folding clasp are common: while the first works purely on a press-to-close principle and has no buttons at all, the second has a push button on the side for opening the bracelet. In both cases, the single folding clasp scores with an extremely quick process of putting the watch on and taking it off, which usually takes just two seconds and is more convenient than a tang buckle.
To reduce the likelihood of the single folding clasp opening accidentally, the so-called safety folding clasp was developed. Just like the standard fold-over clasp, it opens in only one direction, but it is also fitted with a separately closing safety latch. This latch is essentially folded over the clasp once the clasp itself has been closed. If you have a non-metal strap and are looking for an alternative to the tang buckle, you will find a wide selection of these safety folding clasps for retrofitting, especially in the lower price range.
Double Deployant Clasp: In the Style of a Butterfly
A more complex and generally more expensive alternative to the single folding clasp is the so-called butterfly or double deployant clasp. It works with two metal blades that open in opposite directions, recalling the beating wings of a butterfly. Available both with and without push buttons, the double deployant clasp stands out for its adaptability to different types of straps and bracelets: some are integrated into the metal bracelets of high-end timepieces, while others replace tang buckles on leather straps. On the latter, they add not only a modern touch but also a longer lifespan – after all, the leather is no longer bent.
For many owners, the greater complexity of the double deployant clasp comes with a special fascination. Not only the elegant motion of opening and closing, but also their elaborate finishing turns many of these clasps into works of art in their own right alongside the watch. Prestigious materials such as platinum or rose gold take the clasp's exclusivity to the extreme and are often so solid that they create a considerable counterweight to the watch. But even stainless steel versions are significantly heavier than tang buckles. It is a matter of taste, as many wearers prefer the lightness and simplicity of the traditional tang.
Which Watch Clasp Is Right for Me?
Security, comfort, design: watch clasps have a major influence on how a wristwatch feels and looks. To make the right decision when buying a watch or changing the clasp later on, you should take your own lifestyle into account: if you often wear your timepiece for diving or other extreme sports, it makes sense to focus on security. With dress watches, on the other hand, aesthetics take center stage: traditionalists opt for the simple tang buckle, while double deployant clasps appeal to artistic, modern tastes and to lovers of mechanical design. No clasp is inherently tied to a particular price range, but we recommend choosing a high-quality watch clasp – after all, it is the part you feel on your wrist every day.
