The Jacques Bianchi Marseille JB300 is a military-inspired dive watch that the brand presents as a modern tribute to its 1990s predecessor. The standard steel model is listed with a 42 mm case, a SoProd P024 automatic movement and 300 m water resistance. The manufacturer pages provide specifications and variant details, not independent physical testing, so this is a model overview rather than a hands-on performance review.
What is the Jacques Bianchi JB300?
The JB300 is a dive-watch model from Jacques Bianchi Marseille. The brand connects its design to a 1990s military dive-watch heritage, citing details such as the wide notched bezel and Maxi Dial. That heritage and the design connection are the manufacturer’s framing, rather than independently established historical findings. Jacques Bianchi Marseille’s JB300 page describes the watch as water resistant to 300 meters; that is a stated rating, not independent evidence of dive performance.
Jacques Bianchi JB300 steel specifications
The standard steel listing describes a practical, legible layout: a black Maxi Dial with red 24-hour marking, luminous indices, and a date display. Here are the manufacturer’s listed specifications for that model:
| Specification | Standard steel JB300 |
|---|---|
| Case | 42 mm, 316L stainless steel |
| Movement | SoProd P024 Swiss automatic movement |
| Functions | Hours, minutes, seconds and date |
| Dial | Black Maxi Dial with red 24-hour marking and luminous indices |
| Crystal | Sapphire |
| Crown | Screw-down |
| Water resistance | 300 m (30 bar), as stated by the manufacturer |
| Lug width | 20 mm |
| Strap options | Black tropical-style rubber or Perlon, per the product listing |
These details come from the manufacturer’s steel JB300 listing. A 300 m rating is a specification claim; it does not by itself establish how a particular watch performs in use or substitute for checking its condition and suitability before diving.
#1 Best Overall
- From Bulova's Men's Military Collection, explore field watches that pay homage to our unique military heritage.
- 3 Hand, Automatic, Hack Feature
- Silver-Tone Stainless Steel
- Double Domed Mineral Crystal
- 30M Water Resistant and 3 Year Limited Warranty
How the JB300 variants differ
The JB300 name covers listings with meaningful differences. Check the exact reference before comparing dimensions, finish, accessories, stock or price.
| Listing | Case and dial | Movement and resistance | Other listed details |
|---|---|---|---|
| Standard steel | 42 mm 316L stainless steel; black Maxi Dial with red 24-hour marking | SoProd P024; 300 m (30 bar) | 20 mm lug width; rubber or Perlon strap options |
| Blue | 42 mm 316L stainless steel; blue dial | P024, described on the brand’s Bleue page; 300 m | 20 mm lug width; optional steel bracelet upgrade |
| Black PVD | 41.5 mm case; black PVD finish | Automatic SoProd P024; 300 m | 20 mm lug width; the manufacturer listing describes 500 numbered units and marks the edition sold out |
The variant details are from the manufacturer’s blue JB300 listing, black PVD listing and Bleue model-family page. The sold-out label and edition description apply to the cited black PVD page; they do not establish current availability elsewhere.
Rank #2
- Movement Type: Japan NH38 Automatic Case Material: 316L Stainless Steel
- Diameter: 36mm (unincluding crown) Thickness: 14mm(Including Glass） Dial Type: Black Dial Features: Filled with BGW-9 And C3 Luminous
- Glass: Arched Sapphire Crystal, AR Coating Hands: Luminous Coating Strap Material:Nylon / Genuine Leather
- Strap Color:Black / Yellow Strap Width:18mm Strap Length: 22 / 23cm
- Swiss BGW-9 super luminous + C3 super luminous Crown: Screw-in lock Weight: About 78g
Strap fit: what 20 mm tells you
The steel listing gives the JB300 a 20 mm lug width, making 20 mm straps the relevant size category to investigate. Width alone does not guarantee fit: check the attachment style, strap thickness, buckle width and the way you want the watch to sit. The manufacturer names rubber and Perlon options, but its listing does not establish third-party replacement availability.
Price, shipping and availability
The official steel listing displays €1,125 excluding VAT and says the order ships within 48 hours. These are page-specific statements, not a delivered-price quote or confirmation of current stock. Before buying, confirm the exact variant and live availability, then check VAT, shipping and any duties for your destination. The cited listing does not establish the final amount you will pay.
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