Breitling · Colt

Strap for Colt Quartz Black / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter41 mm
ReferenceA7438010.B783.812A
FamilyColt
MovementBreitling caliber B74 hours, minutes, seconds | date | chronometer
Year2006 - 2011
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 A7438010.B783.812A

Selected for the 20 mm lug width

All 20 mm straps →

The Colt A7438010.B783.812A, seen from the bench

The Breitling Colt mounts the automatic caliber B74 with chronometer certification and indication of hours, minutes, seconds and date. The model features essential functions for sport and professional use. 20mm lugs complete the technical specifications of the timepiece.

Frequently asked questions

What is the lug width of the Breitling Colt A7438010.B783.812A?

The lug width of the Breitling Colt A7438010.B783.812A is 20 mm. This measurement is taken internally between the two lugs using a millimetre calliper. It is the key parameter for selecting a compatible strap: any replacement must match this dimension precisely.

What is the best strap for the Breitling Colt A7438010.B783.812A?

The best strap for the Breitling Colt A7438010.B783.812A depends on the intended use. Vegetable-tanned calf leather with a matte finish is the most versatile choice for everyday wear. Glazed alligator suits formal settings. For operational or sport environments, a nylon NATO or a technical rubber strap aligns with the model's tool watch heritage without compromising functionality.

How do you change the strap on the Breitling Colt A7438010.B783.812A?

To replace the strap on the Breitling Colt A7438010.B783.812A, the 20 mm spring bars connecting the strap to the lugs must be removed. A pointed spring bar tool or a dedicated watchmaker's instrument is required. It is advisable to work on a soft surface to avoid scratching the stainless steel case. To preserve the original finish, it is recommended to consult a qualified watchmaker or a specialist atelier.

Are there aftermarket straps compatible with the Breitling Colt A7438010.B783.812A?

Yes, high-quality aftermarket straps compatible with the Breitling Colt A7438010.B783.812A are available, provided they match the 20 mm lug width. Milanostraps.it offers a selection of handcrafted leather, NATO, and rubber straps specifically compatible with this reference. The artisanal quality of a bespoke or specialist-selected strap often surpasses that of the original issue strap in terms of aesthetic adaptability and material longevity.

How long does a leather strap for the Breitling Colt A7438010.B783.812A last?

The lifespan of a leather strap for the Breitling Colt A7438010.B783.812A depends on leather quality, craftsmanship, and usage conditions. A high-quality calf or alligator strap, with regular maintenance, typically lasts between 2 and 4 years of daily wear. Using a deployant clasp significantly reduces mechanical stress on the strap edges, extending its useful life. Casati Milano straps carry an 18-month warranty 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