Breitling · Navitimer

Strap for Navitimer B01 Chronograph 43 Stainless Steel / Copper / Alligator - Folding

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

Lug width22 mm
Case diameter43 mm
ReferenceAB0138241K1P1
FamilyNavitimer
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2022
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 Navitimer AB0138241K1P1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Navitimer AB0138241K1P1, seen from the bench

The Navitimer B01 Chronograph is a 43mm stainless steel professional pilot's watch, reference AB0138241K1P1, featuring a black dial with tri-compax layout and bidirectional bezel with circular slide rule. It houses the Breitling Caliber B01, an in-house chronograph movement with column wheel, vertical chronograph clutch, and 70-hour power reserve, certified chronometer (-4/+6 seconds/day). The 22mm lug width suits the case proportions and accepts various strap materials including alligator leather. Water-resistant to 30 meters.

Frequently asked questions

What is the lug width of the Breitling Navitimer AB0138241K1P1?

The Breitling Navitimer AB0138241K1P1 has a lug width of 22mm. This measurement is taken between the two lugs on the inner side of the case, using a millimetre calliper placed precisely at the strap insertion point. Measuring from the outer edges of the lugs would yield an inaccurate result.

What is the best strap for the Breitling Navitimer AB0138241K1P1?

For the Navitimer AB0138241K1P1 with a black dial, the most suitable options are a matte alligator strap in brown or black, a perforated rally-style calf leather strap for an authentic aviation aesthetic, or a vulcanised rubber strap for sporting wear. A ballistic nylon NATO strap remains the most historically coherent choice for this pilot's watch. All straps must have a 22mm attachment.

How do you change the strap on a Breitling Navitimer AB0138241K1P1?

To replace the strap on the Navitimer AB0138241K1P1, you will need a spring bar tool. Insert the tip into the notch of the spring bar to compress the spring and release the lug. Repeat on both sides. It is advisable to work on a soft surface to protect the stainless steel case from scratches. A watchmaker can carry out the replacement within a few minutes.

Are there aftermarket straps compatible with the Breitling Navitimer AB0138241K1P1?

Yes, any strap with a 22mm attachment is technically compatible with the Navitimer AB0138241K1P1. Milano Straps offers a curated selection of handcrafted leather, rubber, and nylon straps specifically in 22mm. For the best fit, straps with a tapered tail of 20mm are recommended, ensuring compatibility with standard 20mm buckles and deployant clasps.

How long does a leather strap last on a Breitling Navitimer?

The lifespan of a leather strap depends on the material, frequency of use, and exposure to perspiration and moisture. A quality calfskin strap typically lasts 12 to 24 months with daily wear. A high-grade alligator strap can exceed 3 to 5 years if treated with appropriate leather conditioner and rotated with other straps. Milano Straps products 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.

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