
Watches have undergone various stages of development and evolution throughout history. To conquer the skies, a watch must withstand intense vibrations and extreme temperature differences. To conquer the ocean, it has to cope with pervasive water pressure and seawater that can seep through every gap. During these hot summer days, diver‑style watches, with their mechanical‑looking appearance and uniquely‑designed functions, have gradually come into our spotlight.

The reason why diver‑style watches are so popular among mechanical timepieces lies in the fact that, originally designed as tool watches, they are equipped with practical features such as high‑grade water resistance, shock and drop resistance — qualities that many men look for in a watch. Moreover, diver watches have gradually incorporated fashion and sport‑oriented elements in their later development.

Few men can resist the mechanical charm of such a watch. Thanks to its practical performance and striking design, it is hard for any wearer to put it down. Major watch brands have therefore launched their own diver‑style models. Presented below are two heavyweights in the world of dive watches: the Rolex Submariner and the Blancpain Fifty‑Fathoms.

Rolex Submariner
In 1926, Rolex launched the Oyster watch, which brought diver‑style watches onto the historical stage. Even so, the Blancpain Fifty‑Fathoms is widely regarded by many as the original pioneer of dive watches. The reason lies in Blancpain’s invention of the unidirectional rotating bezel, which solved divers’ problem of tracking underwater elapsed time and has since become an indispensable, iconic feature of dive watches. Back then, Blancpain took a shrewd step by patenting this unidirectional rotating bezel and establishing a host of industry‑wide standards and specifications for dive watches. This firmly secured the dominant position of the Fifty‑Fathoms within the diving‑watch sector. Furthermore, the Fifty‑Fathoms was supplied as an official military‑issue watch, further demonstrating the watch’s outstanding reliability and the brand’s strong reputation.


Now let’s turn to our two main protagonists today: the Rolex Submariner series and the Blancpain Fifty‑Fathoms series. Both are dominant icons in the dive‑watch world. We will now take a closer look at these two timepieces.

First up is the Rolex Submariner, currently one of the most hyped‑up watches in the dive‑watch market. It is powered by the legendary, rock‑solid and accurate Cal. 3135 movement, a proven workhorse for 30 years, paired with Rolex’s iconic Mercedes‑style hands. It features an Oyster‑shaped case crafted from 904L stainless steel. Whether it is the understated depth of the Black Submariner, the eye‑catching presence of the Green Submariner, or the distinctive charm of the Blue Submariner, each variant has won a loyal following among diving‑watch enthusiasts.

Next comes the Blancpain Fifty‑Fathoms. It features a typically elegant dial equipped with Blancpain’s exclusive Liquidmetal luminous markers. Its distinctive candle‑shaped hands and enlarged hour indices allow the wearer to read the time accurately under any condition. The watch is fitted with a special stretch‑resistant canvas NATO‑style strap. Meanwhile, its understated and refined dial pairs perfectly with formal attire.


When comparing the two watches, the Rolex Submariner is built from 904L steel, which greatly improves the watch’s corrosion resistance and visual appeal. In 2016, however, Blancpain upgraded the Fifty‑Fathoms with cutting‑edge plasma ceramic, outperforming the Submariner by a considerable margin in both aesthetics and practical performance.

Compared with the Submariner, the Fifty‑Fathoms features a more generously‑sized dial, which places certain requirements on the wearer’s wrist circumference. Even after the material upgrade in 2016 reduced its thickness to 13.40 mm, it only narrowly came close to the average 13 mm thickness of the Submariner range. On the other hand, the entire Fifty‑Fathoms collection comes with an exhibition case‑back, offering extra enjoyment for watch enthusiasts when compared to the Submariner.

Blancpain‑exclusive Cal. 1315 movement with an impressive 60‑hour power reserve
Most Fifty‑Fathoms models are equipped with the in‑house automatic‑winding Cal. 1315 movement, which delivers a 120‑hour power reserve, far exceeding that of the Cal. 3135 movement fitted in the Submariner. Nevertheless, it also has drawbacks, including potential insufficient power output towards the end of the power‑reserve period and an over‑large movement footprint.

Rolex features the Cal. 3135 movement, renowned for its proven reliability and durability.
Most Fifty‑Fathoms watches are fitted with the in‑house self‑winding Cal. 1315 movement, boasting a 120‑hour power reserve that far surpasses the power‑reserve duration of the Cal. 3135 movement inside the Submariner. That said, it also comes with drawbacks, such as reduced power towards the end of the reserve cycle and a larger‑than‑average movement footprint.

To sum up, if you are a seasoned dive‑watch enthusiast, I would recommend the Fifty‑Fathoms. Whether for collection or social gatherings, it stands out as a remarkable deep‑sea gem in your watch cabinet. If you are looking for a versatile timepiece suitable for daily outings and business meetings, the Rolex Submariner is the better choice. The Rolex brand is widely recognized across China, and the watch serves as a sophisticated statement accessory for nearly every occasion.