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Breitling · Colt

Strap for Colt 36 Diamond / Stratus Silver / 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
ReferenceA7438953|G803|178A
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

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Straps for the Colt A7438953|G803|178A

Selected for the 18 mm lug width

All 18 mm straps →

The Colt A7438953|G803|178A, seen from the bench

The Breitling Colt A7438953|G803|178A is a 36mm stainless steel instrument watch from the military and aeronautical Colt collection. It houses the Breitling B74 caliber, COSC chronometer certified, with hours, minutes, seconds and date functions. The lug width is 18mm, a measurement that must be verified precisely on the watch using a caliper, as it determines the correct fit of the strap and prevents damage to the lugs.

Frequently asked questions

What is the lug width of the Breitling Colt A7438953|G803|178A?

The Breitling Colt A7438953|G803|178A has a lug width of 18mm. This measurement should be taken with a calliper between the two lugs, flush against the case. It is the correct dimension to specify when purchasing any compatible strap.

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

For the Colt 36mm, a vegetable-tanned calf leather or alligator strap in 18mm width are the most coherent choices given the instrument aesthetic. A nylon NATO strap honours the military heritage, whilst vulcanised rubber is ideal for sporting use.

How do I change the strap on the Breitling Colt A7438953|G803|178A?

To replace the strap, a dedicated spring bar tool is required to remove the spring bars from the 18mm lugs. Care must be taken to avoid scratching the stainless steel case. If in doubt, it is advisable to consult a watchmaker or the Casati Milano atelier.

Are there aftermarket straps compatible with the Breitling Colt 36mm?

Yes, there are many aftermarket straps with an 18mm attachment compatible with the Breitling Colt 36mm. Milanostraps.it offers a curated selection of handcrafted 18mm straps in leather, alligator, shell cordovan and rubber, designed for this case diameter.

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

A quality leather strap with robust stitching and properly finished edges has an average lifespan of 2–4 years with daily wear. Longevity depends on exposure to perspiration, water and UV rays. Casati Milano vegetable-tanned straps develop a noble patina and can last considerably longer with proper care.

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