Breitling · Colt

Strap for Colt 36 Pearl / Sahara / Folding

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

Lug width18 mm
Case diameter36 mm
ReferenceA7438911/A772/257X/A16D.1
FamilyColt
MovementBreitling 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

Straps for the Colt A7438911/A772/257X/A16D.1

Selected for the 18 mm lug width

All 18 mm straps →

The Colt A7438911/A772/257X/A16D.1, seen from the bench

The Breitling Colt A7438911/A772/257X/A16D.1 is a 36 mm stainless steel instrument watch featuring the Breitling B74 SuperQuartz certified chronometer movement, accurate to ±15 seconds annually. The dial presents hours, minutes, seconds and date with professional hierarchy and no decorative elements. The 18 mm lug width requires careful selection of replacement straps and is less common than the 20 mm found on larger Colt models, making aftermarket selection more selective.

Frequently asked questions

What is the lug width of the Breitling Colt A7438911/A772/257X/A16D.1?

The Breitling Colt A7438911/A772/257X/A16D.1 has a lug width of 18 mm. To confirm this on your own piece, measure the internal distance between the two lugs at the point where they meet the case using a calliper. Any 18 mm strap with a straight end is compatible.

What is the best strap for the Breitling Colt 36 mm?

The choice depends on context. For urban or semi-formal wear, an 18 mm vegetable-tanned calf leather or centre-grain alligator strap complements the brushed and polished steel finish. For sport or outdoor use, a nylon NATO or vulcanised rubber strap maintains the instrument-grade character of the Colt. A steel deployant clasp is recommended for any leather strap pairing.

How do you change the strap on the Breitling Colt A7438911/A772/257X/A16D.1?

The Colt 36 mm uses standard spring bar lugs. Use a spring bar tool — preferably with a nylon or plastic tip to avoid scratching the case — to compress the spring bar within the lug slot and slide the strap free. The procedure is straightforward and fully reversible without specialist tools.

Are aftermarket straps available for the Breitling Colt A7438911/A772/257X/A16D.1?

Yes. Any 18 mm strap with straight ends is compatible with the Colt A7438911/A772/257X/A16D.1. Milano Straps offers a curated selection of handcrafted 18 mm straps in calf leather, alligator, NATO nylon and rubber, all made in Italy and sized specifically for this lug width.

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

Longevity depends on leather quality, thickness and frequency of use. A quality vegetable-tanned calf strap worn daily typically lasts between 18 and 36 months. Alligator leather, owing to its denser scale structure, can exceed three years with routine care. Prolonged exposure to moisture and perspiration should be avoided to extend 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