Breitling · Chronomat B01 44

Strap for Chronomat 44 GMT Stainless Steel / Blackeye Grey / Bracelet

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
ReferenceAB042011.F561.375A
FamilyChronomat B01 44
MovementBreitling caliber Caliber B04 Hours, Minutes, Small Seconds, Additional 24 Hour Hand (adjustable) | 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

Straps for the Chronomat B01 44 AB042011.F561.375A

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 AB042011.F561.375A, seen from the bench

The Breitling Chronomat B01 44 AB042011.F561.375A is a 44mm stainless steel chronograph born in 1984 as the official timepiece of the Italian Air Force Frecce Tricolori. It features the in-house COSC-certified Breitling B04 movement with column wheel chronograph, independent 24-hour hand for GMT function, and a certified precision of ±4 seconds/day. The watch includes iconic rider tabs, bidirectional tachymeter bezel, screw-down caseback, and double-locking crown rated to 200m. Lug width is 22mm.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 AB042011.F561.375A?

The Breitling Chronomat B01 44 AB042011.F561.375A features a lug width of 22mm. This measurement should be taken with a vernier calliper at the narrowest point between the parallel lugs, where the springbars are inserted. All aftermarket straps in 22mm are compatible with this reference.

What is the best strap for the Breitling Chronomat B01 44 AB042011.F561.375A?

The ideal strap depends on the intended use. Hornback alligator leather enhances the formal reading of the watch; vegetable-tanned calf leather develops a personal patina over time; a perforated Rally strap in leather is consistent with the sporting DNA; vulcanised rubber is the preferred choice for humid environments. The correct size is always 22mm.

How do I change the strap on the Breitling Chronomat B01 44?

Strap replacement requires a springbar tool or a fine-tipped lever. Insert the tool into the springbar slot, compress the spring and slide the strap free from the lug. Care should be taken to avoid scratching the stainless steel case. If replacing the original Rouleaux bracelet, ensure standard 22mm springbars are used or the correct bracelet adapter is available.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 AB042011.F561.375A?

Yes. Any 22mm strap with a straight or slightly curved end is compatible with the Chronomat B01 44. Milano Straps offers a curated selection of handcrafted straps in leather, alligator, calf and technical materials, specifically selected for 22mm lugs, with stainless steel buckles and deployant clasps suited to the weight of the 44mm case.

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

Longevity depends on the material and conditions of use. A quality vegetable-tanned calf strap, with regular care and rotation and limited water exposure, will typically last 2–3 years before showing structural wear at the lugs. Shell cordovan and alligator, owing to their fibre density, can exceed 4–5 years. Milano Straps provides 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.

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