Breitling · Chronomat B01 42

Strap for Chronomat B01 42 Stainless Steel / Platinum / Ice Blue

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

Lug width22 mm
Case diameter42 mm
ReferencePB0134101C1S1
FamilyChronomat B01 42
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2021
CasePlatinum, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Chronomat B01 42 PB0134101C1S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 PB0134101C1S1, seen from the bench

The Breitling Chronomat B01 42 is a precision chronograph manufactured in Grenchen, originally developed in 1984 for the Italian aerobatic team Frecce Tricolori. Reference PB0134101C1S1 combines stainless steel and platinum case with a striking ice-blue dial, powered by the exclusive Breitling B01 caliber featuring 70 hours power reserve and 28,800 vph frequency. The 42mm case diameter ensures readability without excessive bulk, while the iconic rider-tab bezel with column-wheel chronograph mechanism remains fully functional. Lug width is 22mm.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 PB0134101C1S1?

The lug width of the Breitling Chronomat B01 42 PB0134101C1S1 is 22mm. This measurement is taken with a digital calliper applied between the case lugs at the strap attachment point. It is a common dimension among high-end manufacture chronographs and ensures broad compatibility with quality aftermarket straps.

What is the best strap for the Breitling Chronomat B01 42 PB0134101C1S1?

For the Chronomat B01 42 with a blue dial, the most suitable options are a smooth-belly alligator strap in dark brown (tobacco) or a vegetable-tanned calfskin strap in black. Both complement the platinum-steel dual-material case without competing with the dial's legibility. A deployant clasp in steel is recommended to balance the strap weight and reduce leather wear over time.

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

The strap on a Breitling Chronomat B01 42 is removed using a fine-tipped or flat spring bar tool, applying gentle pressure on the spring bar housed within the case lugs. With a basic level of dexterity the operation takes under two minutes and requires no professional tools. Place the watch on a soft surface to avoid scratching the caseback or platinum bezel during the process.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 PB0134101C1S1?

Yes. Any strap with a 22mm lug width and standard spring bars is compatible with the Breitling Chronomat B01 42 PB0134101C1S1. MilanoStraps produces handcrafted straps in alligator, vegetable-tanned calfskin, shell cordovan and vulcanised rubber, all cut to 22mm. Each strap is hand-finished at the Casati Milano atelier to ensure a precise fit at the original case lugs.

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

The lifespan of a leather strap depends on frequency of use, exposure to perspiration and moisture, and the quality of the tanning process. A high-grade alligator or vegetable-tanned calfskin strap, rotated regularly with other straps and kept away from water, will typically maintain its structural and aesthetic integrity for between 2 and 5 years. MilanoStraps provides an 18-month warranty against manufacturing defects on all Casati Milano straps.

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.

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