Breitling · Colt

Strap for Colt Quartz Mariner Blue / Bracelet

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
ReferenceA74388111C1A1 (aka: A7438811/C907/173A)
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

Straps for the Colt A74388111C1A1 (aka: A7438811/C907/173A)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Colt A74388111C1A1 (aka: A7438811/C907/173A), seen from the bench

The Breitling Colt A74388111C1A1 is a tool watch with a 44mm stainless steel case and 22mm lug width. It features the Breitling B74 quartz movement, COSC-certified chronometer with ±0.07 seconds per day accuracy. The dial offers basic functions: hours, minutes, seconds, and date. The stainless steel case provides excellent corrosion resistance for marine and high-humidity environments. Compatible with all Milano Straps 22mm straps.

Frequently asked questions

What is the lug width of the Breitling Colt A74388111C1A1?

The lug width of the Breitling Colt A74388111C1A1 is 22mm. This measurement refers to the internal distance between the case lugs at the strap attachment point and is the specification to use when selecting any aftermarket or replacement strap compatible with this reference.

What is the best strap for the Breitling Colt A74388111C1A1?

For the Breitling Colt A74388111C1A1, the most suitable options are: vegetable-tanned calf leather with a smooth grain for refined daily wear, alligator belly for formal occasions, a technical nylon NATO strap to honour the model's military heritage, and a vulcanised rubber strap for sporting or humid environments. The lug width to observe in all cases is 22mm.

How do you change the strap on a Breitling Colt A74388111C1A1?

To replace the strap on the Breitling Colt A74388111C1A1, a springbar tool is required — available from watch retailers or online. Insert the forked tip into the gap between the lug and the strap, compress the ends of the spring bar and slide the strap free. The operation takes approximately two minutes and does not require a watchmaker. It is advisable to work on a soft surface to avoid scratching the case.

Are there aftermarket straps compatible with the Breitling Colt A74388111C1A1?

Yes, the Breitling Colt A74388111C1A1 uses a standard spring bar attachment system with a 22mm lug width, compatible with a wide range of quality aftermarket straps. Milano Straps offers handcrafted straps in leather, alligator, calf and technical textile, made to measure with a 22mm lug end, requiring no adapters. The standard of craftsmanship is comparable to or superior to factory-fitted straps.

How long does a leather strap last on a Breitling Colt A74388111C1A1?

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily usage. A good-quality vegetable-tanned calf strap worn regularly and properly maintained will typically last between two and four years. Frequent exposure to water, perspiration and heat will shorten its useful life. Milano Straps offers an 18-month guarantee 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