Jacques Bianchi Marseille JB300 Black: a diving watch true to its military heritage

19.07.2026

For decades, the name Jacques Bianchi Marseille has been synonymous with French professional diving watches. Following the success of the JB200, the Marseille-based manufacturer continues the revival of its heritage with the JB300 Noire, a watch directly inspired by the military model designed in the early 1990s for professional divers. Without attempting to replicate its predecessor exactly, the JB300 modernizes its design while retaining the elements that forged the reputation of this French diver: robustness, excellent legibility, and a truly utilitarian purpose. This new generation perfectly illustrates the evolution of contemporary military watches, capable of satisfying both divers and tool watch collectors. It is available from €1,395.

Jacques Bianchi Marseille JB300
1.395€
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A watch born from Jacques Bianchi's military heritage

In the 1990s, Jacques Bianchi developed a diving watch for professionals, continuing the tradition of French military watches. The new JB300 Noire takes up this visual identity and modernizes it:

After more than two years of development, this reinterpretation retains the DNA of the historic JB300 while meeting the current demands of mechanical watch enthusiasts.

A design conceived primarily for legibility

Like any true military watch, the JB300 prioritizes efficiency. Its matte black dial features a Maxi Dial with a dual 12/24-hour scale reminiscent of standard-issue military watches. The large ivory hour markers coated with Super-LumiNova and the generously sized hands ensure quick readability, both day and underwater. The large arrow-shaped minute hand and the oversized bezel also contribute to this excellent ergonomics, essential for diving.

A robust case designed for action

The JB300 Noire features a 42mm 316L stainless steel case, whose proportions offer an excellent balance between presence on the wrist and comfort. Key features include:

The overall design immediately inspires confidence and confirms the decidedly utilitarian positioning of this French diver's watch.

The Soprod P024 Movement

To power the JB300, Jacques Bianchi Marseille selected a Swiss automatic Soprod P024 movement. This movement provides the following functions:

This Swiss caliber reflects the company's commitment to offering a reliable watch suitable for both everyday wear and nautical activities.

Discover the complete details of the Jacques Bianchi Marseille JB300 Black watch

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A true 300-meter diver's watch

The JB300 doesn't just boast a diving-inspired style. It offers water resistance to 300 meters (30 bar), fully meeting the expectations of a true dive watch. It also features:

These features make it a watch perfectly suited for both aquatic activities and everyday wear.

Two straps for two styles

The JB300 Black comes with two straps, allowing you to adapt your style to different situations:

This dual selection further enhances the model's versatility.

A French diver's watch with a strong character

One of the great achievements of this JB300 lies in its balance. It retains the aesthetic codes of French military watches without resorting to historical reproduction. Its modern case, highly legible dial, oversized bezel, and Swiss movement allow it to appeal to:

It thus establishes itself as a worthy heir to Marseille's watchmaking history while meeting contemporary standards.

Our review of the Jacques Bianchi Marseille JB300 Black military watch

The Jacques Bianchi Marseille JB300 Black successfully achieves the delicate task of modernizing an iconic military watch without compromising its identity. Its 42mm case, Swiss Soprod P024 automatic movement, 300-meter water resistance, and excellent legibility make it a true tool watch, faithful to the spirit of French professional divers. More than just a tribute, this JB300 represents a coherent evolution of a historic model that continues to shape the history of French dive watchmaking.

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Éric BARSE

Editor: Éric Barse

Journalist, entrepreneur, and founder of the websites www.cafe-racer-only.com and www.scooter-3-roues.com, Eric Barse divides his time between his passions: motorcycles, travel, and watches. A graduate of the Saint-Cyr military academy and the 2nd RPIMA (Parachute Regiment) before pursuing a career in communications and digital media, he has a true passion for authentic watches that have accompanied his two-wheeled adventures for many years, from the Indian Ocean to Africa and Latin America!