Superocean Heritage B31 Automatic 40 Stainless Steel / Black / Rubber

In Context

At 40 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 200 m puts it in dive-watch territory, well past anything daily wear will ask of it.

The movement winds itself from the motion of your wrist. 78 hours of reserve puts it well past a weekend — several days off the wrist and it is still going. At 28,800 vph the seconds hand advances 8 times a second.

AB3110241B1S1 stands on its own in this catalogue — no other reference here shares its base number. It pairs a black sunburst dial with a ceramic, stainless steel case.

The B31 is Breitling's first in-house three-hand movement, introduced in 2025 with the Top Time B31 and the Superocean Heritage B31. It powers 29 watches in this library. Until it arrived, every three-hand Breitling ran an ETA, Sellita or Tudor base. The B31 is Breitling's own: an automatic with a date, 28.4 mm across and 4.8 mm high, with 26 jewels, a beat of 28,800 vph and a 78-hour reserve from a single barrel, certified by the COSC. Its reserve and its thinness are the points, and it is the movement Breitling now builds its slimmer three-handers around. In the library it powers 22 [Superocean Heritage](/brands/breitling/superocean-heritage) references, the B31 Automatic in 42 mm and 44 mm, and 7 [Top Times](/brands/breitling/top-time) at 38 mm and 40 mm. Cases run from 38 mm to 44 mm, with 42 mm the most common. 4 are limited editions. The [B20](/calibers/breitling-caliber-b20), the Tudor-built movement, is what it replaced in the Superocean Heritage, the [Caliber 17](/calibers/breitling-caliber-17) the ETA base before that, and the [B01](/calibers/breitling-caliber-b01) the in-house chronograph it now sits beside.

28 other watches in the library run the Breitling Caliber B31.

Breitling

Top Time B31 Stainless Steel / Green

AB3113171L1X1 · 38 mm

Breitling

Superocean Heritage B31 Automatic 40 Kelly Slater / Rubber

AB31101A1C1S1 · 40 mm

Breitling

Superocean Heritage B31 Automatic 42 Stainless Steel / Black / Rubber

AB3111241B1S1 · 42 mm

Breitling

Superocean Heritage B31 Automatic 44 Stainless Steel / Green / Milanese

AB3112361L1A1 · 44 mm