A symbol of Marseille

The Jacques Bianchi JB300 continues the maker's traditions of French-built tool divers, but cast in a wholly new visual identity, defined by a dial in a deep, mysterious blue. This blue is not a mere aesthetic choice: it evokes the Mediterranean, the sea breeze, and elegantly reflects the watchmaker’s Phocaean heritage. 

This rich blue JB300 retains all the technical specifications that have defined success for this collection: its water resistance to 300 meters, 42mm 316L steel case, unidirectional bezel with oversized notches, automatic Swiss mechanical movement (P024), flat sapphire crystal and “Maxi Dial” type dial with double 12/24h scale. The only difference: its blue dial, unprecedented in the history of the JB300, is matte treated to preserve perfect contrast and readability, in extreme conditions and at great depths.

A leader in the French watchmaking industry, Jacques Bianchi Marseille continues to push the boundaries of innovation with the JB300. An heir to the military diving watches of the 1990s, the JB300 combines rugged tool watch spirit with the modernity of contemporary lines. True to its heritage, it preserves the soul of professional diving watches with its oversized bezel and ultra-readable dial. It also honors its military legacy, appealing to active duty operators and diving professionals, as well as recreational divers and watch collectors.