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Breitling · Colt

Strap for Colt 36 Pearl / Bracelet

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

18mm
18 mm strapsAll Breitling
Lug width18 mm
Case diameter36 mm
ReferenceA7438911/A772/178A
FamilyColt
MovementBreitling caliber Caliber B74 Hours, Minutes, Seconds | Date | Chronometer
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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The Colt A7438911/A772/178A, seen from the bench

The Breitling Colt 36 Pearl (ref. A7438911/A772/178A) features a 36mm stainless steel case with balanced proportions designed for professional use. It houses the Breitling B74 movement with hours, minutes, seconds, date, and COSC chronometer certification, guaranteeing daily precision between -4 and +6 seconds. The dial prioritizes readability with clear indices and luminous hands. The watch accepts 18mm straps at the lugs, tapering to approximately 16mm at the buckle, requiring precise measurement before fitting aftermarket straps.

Frequently asked questions

What is the lug width of the Breitling Colt A7438911/A772/178A?

The lug width of the Breitling Colt A7438911/A772/178A is 18mm. This measurement refers to the internal distance between the case lugs at the strap attachment point. It is essential to respect this specification to ensure correct fitment and to protect the lug surfaces from scratching or deformation.

What is the best strap for the Breitling Colt A7438911/A772/178A?

For the Breitling Colt A7438911/A772/178A, the ideal choice depends on intended use. For formal or collector contexts, a vegetable-tanned alligator strap in tobacco or midnight blue enhances the case finishing. For everyday wear, grain anglais calf leather develops an authentic patina over time. For sports or nautical contexts, vulcanised rubber offers maximum resilience. A premium NATO strap remains the most coherent choice with the Colt's military DNA.

How do you change the strap on the Breitling Colt A7438911/A772/178A?

To replace the strap on the Breitling Colt A7438911/A772/178A, use a dedicated spring bar tool or a watch strap lever. Carefully remove the spring bars connecting the strap to the lugs, taking care not to scratch the stainless steel case. Insert the new 18mm strap by clicking the spring bars into the lug holes. The operation takes approximately two minutes and does not require professional tools.

Are there aftermarket straps compatible with the Breitling Colt A7438911/A772/178A?

Yes, the aftermarket offers a wide selection of straps compatible with the Breitling Colt A7438911/A772/178A. Simply choose a strap with an 18mm lug width and verify the taper towards the buckle (typically 16mm). Milano Straps offers a comprehensive range of handcrafted options — alligator, calf leather, NATO, rubber — made from selected materials, available with or without a deployant clasp.

How long does a leather strap last on a Breitling Colt A7438911/A772/178A?

The lifespan of a leather strap paired with the Breitling Colt A7438911/A772/178A depends on the quality of the tanning process, daily use, and maintenance. A quality vegetable-tanned calf leather strap, worn regularly, has an average lifespan of 2–4 years. Alligator leather, being denser and more resilient, can last 5–7 years if kept away from prolonged moisture. Avoiding contact with water, excessive perspiration, and chemical agents significantly extends strap 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