Chronomat B01 42 TPD & Winder Settings | Swiss Watch Store
An automatic like the Breitling Chronomat B01 42 only stays accurate while its mainspring holds charge. This model carries reference AB0134. It is powered by the Calibre B01 movement. Set your winder to the figures below and the Chronomat B01 42 stays wound, accurate and ready to pick up.
TPD and Winding Direction
The correct setting for the Chronomat B01 42 is 800 turns per day, bidirectional: 800 turns per day with the rotor turning in both directions.
| Turns per day (TPD) | 800 |
| Rotation direction | Bidirectional |
| Movement | Calibre B01 |
Why the Correct Setting Matters
The correct TPD mirrors what your wrist would do naturally across a normal day. It holds the mainspring at a healthy charge so the Chronomat B01 42 runs at its best and is ready to wear at a moment's notice — exactly what a watch winder is for.
Don't worry if you're unsure — you can't break a modern automatic with the wrong winder setting; the slipping bridle on the mainspring makes overwinding impossible. The right setting just keeps everything running at its best.
Choosing a Watch Winder for the Chronomat B01 42
The key feature to shop for is programmability: independent TPD and direction controls that cover 800 TPD bidirectional. Single-watch winders are ideal if the Chronomat B01 42 flies solo; multi-watch winders make sense the moment you own two or more automatics. Our watch winder collection covers both.
Chronomat B01 42 Winder FAQs
What's the correct TPD setting for the Chronomat B01 42?
The Chronomat B01 42 is specified at 800 turns per day. Most programmable winders offer this as a standard preset.
Which winding direction should I use?
Bidirectional — the winder should rotate in both clockwise and anticlockwise directions.
Can I use any watch winder for my Chronomat B01 42?
Yes — provided it's programmable. Verify the winder offers 800 turns per day with bidirectional rotation before buying; fixed-setting winders may not match.