Milano Straps
← BreitlingSearchCart
Menu

Breitling · Chronomat B01 42

Strap for Chronomat B01 42 Red Gold - Diamond / Silver / Rubber

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Breitling
Lug width22 mm
Case diameter42 mm
ReferenceRB0134721G1S2
FamilyChronomat B01 42
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseRed Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

View →

Straps for the Chronomat B01 42 RB0134721G1S2

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 RB0134721G1S2, seen from the bench

The Chronomat B01 42 Red Gold (ref. RB0134721G1S2) traces its origin to 1984 as an operational instrument for the Frecce Tricolori aerobatic team. The 42mm case is crafted in 18-carat red gold, combining precious material with technical functionality. The in-house B01 chronometer-certified movement features column wheel mechanism, hours, minutes, small seconds, date, and approximately 70 hours power reserve. The bidirectional red gold bezel with tachymetric scale and characteristic rider tabs reflect the watch's aviation heritage. Lug width is 22mm, designed for robust bracelets and structured straps compatible with this precise measurement.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 RB0134721G1S2?

The lug width of the Breitling Chronomat B01 42 RB0134721G1S2 is 22mm. This measurement refers to the internal distance between the two lugs of the case, best taken with a digital calliper directly at the strap attachment point. All straps and buckles must match this dimension to ensure a precise fit with no lateral play.

What is the best strap for the Breitling Chronomat B01 42 RB0134721G1S2?

Given the 18-carat red gold case of the Chronomat B01 42, a vegetable-tanned alligator strap in bordeaux, cognac or dark brown is the most coherent choice for formal wear. For everyday sporting use, high-density vulcanised rubber preserves the technical character of the model. Shell cordovan is an excellent alternative for those seeking a dense, wear-resistant surface with a distinctive burnished finish.

How do you change the strap on a Breitling Chronomat B01 42?

The strap on the Breitling Chronomat B01 42 is removed using a fine-tipped spring bar tool inserted into the slot at the side of each lug to compress the spring bar and release the strap. Care should be taken to avoid scratching the red gold case; nylon lug protectors are advisable, or the work may be entrusted to a watchmaker. Replacement spring bars must be compatible with the 22mm lug width of this model.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 RB0134721G1S2?

Yes, the Breitling Chronomat B01 42 RB0134721G1S2 uses a standard 22mm lug attachment with conventional spring bars, making it compatible with a wide range of quality aftermarket straps. Milano Straps offers bespoke handcrafted straps in 22mm, available in alligator, calf leather, shell cordovan and rubber. Compatibility is determined by lug width; strap length should be chosen according to wrist circumference.

How long does a leather strap last on a Breitling Chronomat B01 42?

The lifespan of a leather strap depends on the material, care routine and frequency of use. A high-quality vegetable-tanned alligator strap, properly maintained and rotated with other straps, can last between three and seven years while developing an attractive patina. Prolonged exposure to perspiration, water and UV light accelerates deterioration. Milano Straps straps carry an 18-month guarantee against manufacturing defects.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only