JB300 Indigo Maris
Grade 5 Titanium: A matter of substance, not style
Let's start with the material, because on the JB300 Indigo Maris, it's not just a spec sheet argument. Grade 5 titanium—designated Ti-6Al-4V in aeronautical nomenclature—is the alloy found in surgical implants, aircraft turbines, and professional diving equipment. Twice as light as stainless steel with equivalent strength, hypoallergenic, stable over time: its qualities are concrete and measurable.
On this edition, the house introduces a brushed and polished finish that changes the perception of the case. Satin-finished surfaces absorb light and structure the volume; polished edges capture it and emphasize the angular geometry of the case. The result is almost sculptural. The case measures 41.5 mm in diameter and 13 mm thick, with a lug-to-lug distance of 20 mm—proportions calibrated for prolonged wear on the wrist, without compromising on presence.
Indigo Maris: when color becomes the argument
Naming a watch after its color is a gamble: it assumes that the dial lives up to the promise. The JB300 Indigo Maris's dial does. The chosen shade is dense, maritime, deep; it changes character depending on the angle and light, oscillating between midnight blue and vibrant indigo. This is not the seasonal blue that limited editions feature to fit current trends — it's a color with a purpose: to evoke water, the Mediterranean, the seabed, all that a serious diver is meant to encounter.
The display architecture remains true to the genre's fundamentals: generous indices, bold hands, immediate visual hierarchy. And in the dark, the Super-LumiNova® BGW9 takes over with a characteristic blue glow, perfectly consistent with the dial's chromatic identity. This seemingly anodyne detail — the continuity between the daytime color and the hue of the nighttime luminescence — is actually rare in this price range. It demonstrates an attention that goes beyond mere expertise.
Technology serving the user
The JB300 Indigo Maris does not seek to reinvent the diver. It rigorously applies the attributes that have defined the genre since the 1950s: a notched unidirectional bezel with a luminescent pearl, a protected screw-down crown, sapphire crystal, and 300-meter water resistance. This last detail is worth noting: 300m is 100m more than the usual standard for entry- and mid-range divers. Not a gimmick – a real safety margin.
The chosen movement is the SoProd P024, an automatic Swiss caliber. Robust, stable over time, reliable in real conditions: this is exactly what a tool watch requires – regularity over spectacle. The strap supplied with the watch is made of technical textile, a JBM signature that fully contributes to the collection's identity.
Marseille as a starting point
There is a Marseillaise way of existing: without unnecessary fuss, by building something solid and letting the product speak for itself. Jacques Bianchi Marseille works exactly like that. The company assembles its watches in the Phocaean city, claims this origin without grandstanding, and builds its reputation piece by piece — literally and figuratively.
SPECIFICATIONS
BOX
Dimensions: 41.5 mm × 13 mm
Crown: Screwed, protected
Bezel: Unidirectional notched, luminous pearl at 12 o'clock
ICE
DIAL
Indices: Applied Super-LumiNova® BGW9 with blue emission
Hands: Hours, minutes, and seconds—immediate readability hierarchy
MOVEMENT
Functions: Hours, minutes, seconds
STRAP
JBM signature technical textile
Lug width: 20 mm
WATER RESISTANCE
Super-Luminova®: Legacy Illuminates the JB300
At Jacques Bianchi Marseille, visibility remains a fundamental promise, ever since the brand's beginnings.
The JB300 Indigo Maris transcends darkness to offer unparalleled legibility, thanks to the meticulous application of Super-LumiNova® BGW9 on the indexes and hands. The blue-emitting luminescent coating complements the dial color and ensures perfect clarity, even in abyssal depths.
On the dense, functional, anti-reflective indigo dial, the light emitted by the luminescent elements guides each dive with precision. Technique meets instinct in a watch designed to illuminate underwater exploration.
150 UNITS
A limited and numbered series of 150 pieces, assembled in Marseille with full traceability. Each watch bears its engraved number on the case back—simple, without ceremony—and embodies the brand's philosophy from the start: to offer sincere dive watches, built to last, without dissolving the brand's identity into a volume-driven approach.