Breitling · Chronomat B01 41

Strap for Chronomat 41

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter41 mm
ReferenceAB0140AAC830378A
FamilyChronomat B01 41
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 41 AB0140AAC830378A?

The lug width of the Breitling Chronomat B01 41 AB0140AAC830378A is 20 mm. This measurement is taken between the two lugs of the case and is the primary parameter for selecting a compatible strap. It can be verified precisely using a vernier calliper positioned inside the lugs.

What is the best strap for the Breitling Chronomat B01 41 AB0140AAC830378A?

This depends on the intended use. For formal occasions, a 20 mm alligator strap with a polished finish complements the dial's character beautifully. For everyday or sporting use, a vegetable-tanned calfskin strap offers durability and develops a natural patina over time. NATO nylon or vulcanised rubber straps are well suited to active use, honouring the Chronomat's aeronautical origins.

How do you change the strap on a Breitling Chronomat B01 41 AB0140AAC830378A?

The strap is removed using a springbar tool. The 20 mm spring bars must be compressed laterally to release the strap from the lugs. Care should be taken to avoid scratching the stainless steel case: place the watch face-down on a soft cloth and work gently. If in doubt, a watchmaker can perform the swap in a matter of minutes.

Are there aftermarket straps compatible with the Breitling Chronomat B01 41 AB0140AAC830378A?

Yes. Any strap with a 20 mm attachment is technically compatible with this model, provided the standard length (approximately 120/75 mm) and the thickness of the tail are appropriate for the Chronomat's lugs. Milano Straps offers a selection of handcrafted 20 mm straps made to measure, also available with a deployant clasp for a more secure fit.

How long does a leather strap last on a Breitling Chronomat B01 41?

Longevity depends on the quality of the leather, the tanning method and daily use. A quality vegetable-tanned calfskin strap, with minimal maintenance (nourishing cream every 3–4 months, avoiding prolonged exposure to water), can last between 2 and 5 years. Alligator straps, owing to the natural resilience of the reptile's grain texture, tend to last even longer while retaining an impeccable appearance.

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