Breitling · Chronomat B01 44

Strap for Chronomat 44 Stainless Steel / Black / Japan Special Edition

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

Lug width22 mm
Case diameter44 mm
ReferenceA001B1PA (aka: A001B-1PA, A001B1PA)
FamilyChronomat B01 44
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2019
CaseStainless 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 44 A001B1PA (aka: A001B-1PA, A001B1PA)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 A001B1PA (aka: A001B-1PA, A001B1PA), seen from the bench

The Chronomat B01 44 is equipped with the automatic Caliber B01 movement with column-wheel chronograph function and chronometer certification. The case has a diameter of 44mm with 22mm lugs. The movement provides indication of hours, minutes, small seconds, date and chronograph.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 A001B1PA?

The lug width of the Breitling Chronomat B01 44 A001B1PA is 22mm. This measurement is taken internally between the two lugs using a digital calliper placed directly against the case at its narrowest point. All aftermarket straps in the 22mm size are geometrically compatible with this reference.

What is the best strap for the Breitling Chronomat B01 44 A001B1PA?

The ideal choice depends on intended use and personal style. For a sport-elegant look, an alligator strap with hornback grain or a vegetable-tanned calf leather in tobacco or navy tones pairs exceptionally well with the steel case. For more active wear, a vulcanised rubber strap with a technical texture or a ballistic nylon NATO strap underscores the Chronomat's professional character. A 22mm steel deployant clasp is recommended for daily wearers.

How do you change the strap on a Breitling Chronomat B01 44 A001B1PA?

The Chronomat B01 44 uses a standard 22mm spring bar attachment system. Strap removal requires a flat-headed spring bar tool or a dedicated lug lever to release the spring bars housed within the lugs. The operation can be carried out independently with the appropriate tools, or entrusted to a watchmaker or to the Casati Milano atelier, which offers a fitting service upon strap delivery.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 A001B1PA?

Yes. Any strap with a 22mm lug width is geometrically compatible with the Breitling Chronomat B01 44 A001B1PA. Milano Straps offers a curated selection of handcrafted straps in leather, rubber and nylon, all made from premium materials and available in the 22mm size, with pin buckle or stainless steel deployant clasp options.

How long does a leather strap last on a Breitling Chronomat B01 44?

The longevity of a leather strap depends on the quality of the hide, the tanning process, and daily care. A high-quality vegetable-tanned leather strap, kept away from prolonged water exposure and treated periodically with a suitable leather conditioner, can last between three and six years with regular wear. Fine alligator straps develop a distinctive patina over time, which enhances their aesthetic value. Applying a leather-specific water-repellent spray will noticeably extend the strap's service life.

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