Certina DS Action Diver 40.5mm - Review

A new size in the DS Action line

Certina is known for its robust and reliable diving watches. However, the models were often perceived as too large: you could choose between a compact 38mm or a substantial 43mm. With the introduction of the Certina DS Action Diver 40.5mm, the brand has finally found that perfect middle ground. This model combines wearing comfort with the professional specifications for which the DS line is known. During our review period, we wore the watch daily for a week. The result? A surprisingly versatile diving watch that not only performs underwater but also impresses above water.

Cabinet and dimensions

The case has a diameter of 40.5 mm , a thickness of 14 mm , and a weight of 190 grams . This gives the watch a solid feel without being overly heavy. The case is made of stainless steel and meets the ISO 6425 certification for diving watches. This means the DS Action Diver is not just a sporty-looking watch; it has actually been tested to the strictest standards for professional diving.

The water resistance is impressive: 300 meters . Thanks to the new generation DS Concept (Double Security) , the watch can withstand extreme conditions, such as shocks and pressure variations.

Dial

The dial is clean and uncluttered, just as you'd expect from a functional dive watch. The large indices and hands are equipped with Super-LumiNova , which ensures excellent readability in the dark or underwater. During our test, we found the lume to be strong and long-lasting, making it easy to read the time.

The watch is available in several color variations, including white and black, giving you plenty of options to choose a version that suits your style.

Bezel

The dive bezel feels solid and precise. It clicks into position with a satisfying feeling and prevents accidental reversal – a crucial detail when diving. The finish gives it a sporty look without being flashy.

Band

The DS Action Diver 40.5mm comes with a stainless steel bracelet. However, its 20mm lug width makes it easy to change the strap. This is ideal for enthusiasts who like to alternate between rubber or NATO straps. During the review, for example, we paired the watch with a NATO strap from Watch Mates, which gave the watch a more sporty look.

Carrying experience

One of the biggest advantages is its comfort. While the 43mm version might feel too large for some wrists, the 40.5mm is a true all-rounder. It has a sporty look, yet remains wearable for both formal and casual occasions. After a week of daily use, the watch doesn't feel bulky or heavy, but rather a pleasant companion.

Conclusion: The perfect middle ground

With the DS Action Diver 40.5mm, Certina proves they're listening to their customers. This watch combines the professional specifications of a true diver with a more accessible size. For anyone looking for a reliable, robust, yet wearable diving watch, this model is a winner.

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