Breitling · Colt

Strap for Colt Quartz Volcano Black / Rubber / Pin

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
ReferenceA7438811/BD45/131S/A20S.1
FamilyColt
MovementBreitling caliber B74 hours, minutes, seconds | date | chronometer
Year2015
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 Colt A7438811/BD45/131S/A20S.1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Colt A7438811/BD45/131S/A20S.1, seen from the bench

The Breitling Colt A7438811/BD45/131S/A20S.1 is a 44mm stainless steel sports watch with a 22mm lug width, originally designed in the 1980s for military pilots and special forces personnel. It features the Breitling B74 automatic movement, certified COSC chronometer with a tolerance of -4/+6 seconds per day, displaying hours, minutes, seconds and date. The watch combines a unidirectional steel bezel, anti-reflective sapphire crystal, and screw-down crown for water resistance, delivering a compact instrument built for durability.

Frequently asked questions

What is the lug width of the Breitling Colt A7438811/BD45/131S/A20S.1?

The lug width of the Breitling Colt A7438811/BD45/131S/A20S.1 is 22mm. This measurement is taken with a calliper at the inner distance between the two lower lugs at the point of strap attachment. Only straps with a 22mm attachment width should be used to ensure proper fit and wrist security.

What is the best strap for the Breitling Colt A7438811/BD45/131S/A20S.1?

For the Breitling Colt A7438811/BD45/131S/A20S.1, the ideal strap depends on the intended use. A woven nylon NATO strap is the most consistent choice with the model's operational heritage: durable, water-resistant and easily replaceable. For daily smart-casual wear, vegetable-tanned calfskin or alligator with a steel buckle offers a quality pairing. For sporting or aquatic environments, vulcanised rubber is the most technically appropriate option.

How do you change the strap on the Breitling Colt A7438811/BD45/131S/A20S.1?

To replace the strap on the Breitling Colt A7438811/BD45/131S/A20S.1, a pointed or forked spring bar tool is required. Insert the tool into the notch of the spring bar, compress it laterally and slide it out of the lug. Repeat on the opposite side. Fit the new 22mm strap by inserting one end of the spring bar into the lug, then compress and snap the other side into place. The procedure takes approximately two minutes and requires no professional equipment.

Are there aftermarket straps compatible with the Breitling Colt A7438811/BD45/131S/A20S.1?

Yes, the Breitling Colt A7438811/BD45/131S/A20S.1 uses a standard spring bar attachment system with a 22mm lug width, compatible with any quality aftermarket strap meeting this specification. Milano Straps offers a curated selection of handcrafted straps in alligator, calfskin, shell cordovan, NATO and rubber, all specifically compatible with this reference and available online with prompt dispatch.

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

The lifespan of a leather strap depends on the material, tanning quality and daily usage. A quality vegetable-tanned calfskin strap worn daily and properly maintained typically lasts between 2 and 4 years. Vegetable-tanned alligator, owing to the density of its fibres, can reach 5 to 7 years with appropriate care. Shell cordovan exhibits superior resistance compared to most bovine leathers. Avoiding prolonged exposure to water, perspiration and direct UV radiation significantly extends the lifespan of the strap.

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