Breitling
Chronomat B31 Automatic 40
Ref. AB3114101C1A1
2026–present · 40mm · caliber Breitling Cal. B31: Breitling-designed manufacture three-hand automatic, built on an exclusive production line at Sellita's AMT division, 28,800bph, 78h PR; free-sprung balance, skeletonized oscillating weight; COSC-certified; launched 2025, first fitted to the redesigned Chronomat in 2026
Live pricing is coming soon. Get notified when it is available for this reference.
Movement tier: unclassified
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.
Not yet rated
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal: the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
Search pre-owned listings
Authentication
This is a three-hand time-and-date watch with no chronograph pushers; a case with chronograph pushers is a different Chronomat reference (the B01 42).
Known issues in the market
- Cal. B31 is Breitling's first in-house three-hand manufacture movement, built on a dedicated line at Sellita's AMT division starting in 2025; a movement resembling a generic Sellita SW200/300 through the caseback does not match this caliber.
- The 2026 Chronomat redesign conceals the lugs within the case for a more integrated look; a case with exposed, separate lugs is the pre-2026 generation, not this reference.
- The Rouleaux bracelet on this generation has a concealed butterfly clasp with a built-in micro-adjustment system; a plain fold-over clasp without micro-adjustment does not belong to this generation.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| case | No chronograph pushers | Smooth case flanks at 2 and 4 o'clock with only the crown present; this is a time-and-date model, not a chronograph | Chronograph pushers present at 2 and 4 o'clock, indicating the case belongs to the Chronomat B01 42 rather than the B31 Automatic 40 |
| caseback | Cal. B31 manufacture architecture | Free-sprung balance and a skeletonized oscillating weight with Geneva stripes and perlage visible through the sapphire caseback, signed Breitling Manufacture Caliber B31 | A generic-looking automatic rotor with no free-sprung balance or manufacture finishing, indicating a different or substituted movement |
| bracelet | Rouleaux bracelet micro-adjustment clasp | Concealed folding butterfly clasp with an on-the-fly micro-adjustment mechanism built in, matching the 2026 redesign | A plain fold-over clasp with no micro-adjustment, consistent with the pre-2026 Chronomat bracelet rather than this reference |
Common legitimate replacements
- As a newly introduced reference (2026), aftermarket parts are not yet widespread; service should still be directed to a Breitling-authorized watchmaker given the new manufacture caliber.
Expert resources: Breitling Chronomat documentation at breitling.com. WatchUSeek Breitling subforum for Cal. B31 identification and 2026 Chronomat redesign details.
