Superocean Heritage B31 Automatic 40

It is a Swiss luxury dive watch from Breitling's 2025 redesign of the Superocean Heritage line, which traces its design back to the brand's pioneering 1957 Superocean. The headline news is twofold: a long-requested compact 40 mm case and, for the first time in the line, Breitling's own manufacture three-hand movement, the Caliber B31. It combines vintage-inspired diver aesthetics—a domed crystal, a unidirectional ceramic bezel and a symmetrical 6 o'clock date, with modern engineering and 200 m water resistance, making it as comfortable in the office as in the water.

This reference is a 40 mm stainless-steel case, around 11.73 mm thick, with a unidirectional rotating bezel fitted with a colored ceramic insert and Super-LumiNova hands and indexes for underwater legibility. The 40 mm is offered with black or green dials, and sits within a wider family that also includes 36 mm, 42 mm and 44 mm sizes plus a 42 mm chronograph.
Each model can be worn on a tropic-style rubber strap or a mesh steel bracelet, both echoing the line's mid-century character.

It is powered by the Caliber B31, Breitling's first exclusive in-house three-hand automatic movement, developed over several years with Sellita's high-end division. It beats at 28,800 vph (4 Hz) and offers a generous 78-hour power reserve—letting the watch continue to work after a weekend off the wrist. The B31 is officially COSC-certified, guaranteeing chronometer accuracy of -4/+6 seconds per day, and is visible through a sapphire exhibition caseback. Its arrival marks a milestone, giving the Superocean Heritage a true manufacture caliber rather than an outsourced movement.