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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).
| 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 |
