The Chronomat B01 42 and Avenger Automatic 42 share a diameter and a manufacturer, but they do not offer the same kind of watch. The Chronomat gives you a mechanical stopwatch and a distinctive Rouleaux bracelet. The Avenger keeps a three-hand dial and a considerably thinner case.
That makes the first decision simple: do you want to own and operate a chronograph? If the answer is yes, the Chronomat’s additional complexity has a purpose. If it is no, the Avenger supplies much of Breitling’s assertive sports-watch appearance without the extra counters.
The references compared
| Feature | Chronomat AB0134101G1A1 | Avenger A17328101B1A1 |
|---|---|---|
| Case diameter | 42 mm | 42 mm |
| Thickness | 15.1 mm | 12.15 mm |
| Movement | Manufacture Calibre 01 automatic | Breitling 17 automatic |
| Reserve | Approximately 70 hours | Approximately 38 hours |
| Chronograph | Yes; 30-minute and 12-hour counters | No |
| Calendar | Date | Date |
| Water resistance | 200 m | 300 m |
| Bracelet | Steel Rouleaux | Three-row steel |
| Lug width | 22 mm | 22 mm |
Specifications: Chronomat exact specifications; Avenger Automatic 42 specifications.
Two distinct chapters in Breitling’s sporting history
The modern Chronomat design grew from the 1983 Frecce Tricolori watch, followed by the wider 1984 introduction. Raised bezel tabs and the Rouleaux bracelet became central to its identity. Later generations added the manufacture B01 movement and renewed the emphasis on that recognisable bracelet.
The Avenger arrived in 2001, making it a newer expression of Breitling’s aviation interests. Its present family separates chronograph, GMT and simpler automatic roles. This comparison therefore uses two different briefs within the catalogue, rather than two equivalent chronographs. The Chronomat’s historical exterior surrounds more mechanical functionality, while this Avenger concentrates its sporting language into a simpler display.
Almost three millimetres changes the case
The Chronomat is 15.1 mm thick, against 12.15 mm for the Avenger. With both measuring 42 mm across, height becomes a particularly clear distinction. The Avenger deserves priority if a tall watch has been a problem beneath sleeves or during ordinary desk use.
The Chronomat’s greater height is part of a more substantial package. Its chronograph pushers and raised bezel tabs add to the visible hardware. That can be precisely the attraction for someone who wants a watch to look mechanically involved.
Try the watches in profile instead of looking only at their matching diameters. A round face does not communicate how far the complete case projects from the wrist. The difference here is large enough to deserve more attention than a small movement-reserve advantage.
The chronograph should earn its dial space
The B01 supplies a quarter-second chronograph with 30-minute and 12-hour counters. That creates something to operate and read beyond ordinary time. It also requires the face to accommodate more information.
The Avenger’s three-hand-and-date arrangement is easier to understand immediately. Its rotating bezel still provides an elapsed-time reference, though it does not perform the same job as a chronograph with separate counters. Decide whether you want stopwatch functionality or simply an occasional marker for a starting minute.
A chronograph can also be enjoyable because you like its mechanism and display. That is a reasonable reason to choose it. The weaker argument is paying for extra functions because a more complicated watch seems like the inevitable next step.
The bracelet creates another important difference
The Chronomat’s cylindrical Rouleaux links are one of its strongest visual features. They create a distinctive rhythm around the wrist and connect with the rounded controls. If those links are what first draw your eye, they are a valid reason to keep this model on the shortlist.
The Avenger uses a more conventional three-row steel bracelet. It makes the case and dial the main subjects, rather than giving the attachment equal visual emphasis. Someone who wants a less decorative sporting watch may prefer that relationship.
Compare the fit and clasp position of the actual bracelets. A distinctive design only earns its place when you enjoy it as a complete object, not merely as an attractive detail in a close-up photograph.
Reserve and water resistance point in different directions
The Chronomat offers approximately 70 hours of reserve, while the Avenger lists approximately 38. The longer reserve is useful in a rotation, particularly for a weekend away from the wrist. The Avenger requires a more regular wearing or resetting routine.
The Avenger, however, has the higher published water rating: 300 m against 200 m. Spending more on the chronograph does not lift every specification. Both include a date, so calendar convenience is not a reason to prefer one over the other.
The better everyday Breitling
Choose the Chronomat if you want the B01 chronograph, the Rouleaux bracelet and the substantial exterior that brings them together. Its extra thickness is easier to accept when the complete design is the attraction.
Choose the Avenger Automatic if you want a clearer dial, less height and a strong sporting appearance. It is a deliberate choice of fewer functions, not an incomplete version of a chronograph. The right daily watch is the one whose functions and proportions you will keep appreciating.
Based on manufacturer information. Specifications checked on 8 September 2026.
Image: AI-generated editorial illustration of the Breitling AB0134101G1A1. Fine dial details and finishing may differ from the production watch.
