Breitling · Colt

Strap for Colt Lady Diamond / Pearl Diamond / Bracelet

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width16 mm
Case diameter33 mm
ReferenceA77388531A1A1 (aka: A7738853/A769/175A)
FamilyColt
MovementBreitling caliber Caliber 77 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 A77388531A1A1 (aka: A7738853/A769/175A)

Selected for the 16 mm lug width

All 16 mm straps →

The Colt A77388531A1A1 (aka: A7738853/A769/175A), seen from the bench

The Breitling Colt A77388531A1A1 (also referenced as A7738853/A769/175A) is a 33mm stainless steel sports watch from the Swiss manufacturer's aeronautical line, featuring the in-house Breitling 77 movement certified by COSC (±4/+6 seconds per day). The dial displays hours, minutes, seconds and date with clear readability. The lug width is 16mm, a specification critical for aftermarket strap selection on this compact case size. Originally designed in the 1980s as a robust instrument watch, the Colt has evolved to offer everyday wearability without compromising its military and professional heritage.

Frequently asked questions

What is the lug width of the Breitling Colt A77388531A1A1?

The Breitling Colt A77388531A1A1 features a lug width of 16mm. This measurement refers to the internal distance between the two case lugs and is the critical parameter to verify before purchasing any aftermarket strap. Using a digital calliper ensures an accurate reading.

What is the best strap for the Breitling Colt A77388531A1A1?

The ideal choice depends on the intended use. For formal or business settings, a vegetable-tanned calf leather or bombé alligator strap in 16mm complements the stainless steel case whilst maintaining correct proportions. For sport or intensive daily use, a ballistic nylon NATO or vulcanised rubber strap offers superior resistance and practicality.

How do I change the strap on a Breitling Colt A77388531A1A1?

Strap replacement requires a fine-tipped or forked spring bar tool, inserted into the spring bar slot located inside each lug. Pressing the spring bar inward releases the strap. Care should be taken to avoid scratching the case: soft plastic protectors placed around the lugs are recommended, particularly on polished steel cases.

Are there aftermarket straps compatible with the Breitling Colt A77388531A1A1?

Yes. Any strap with a 16mm lug width and standard spring bars is physically compatible with the Breitling Colt A77388531A1A1. Milano Straps offers a curated selection of handcrafted straps in 16mm, including Tuscan calf leather, alligator, shell cordovan, and rubber, with stainless steel buckle or deployant clasp options.

How long does a leather strap last on a Breitling Colt A77388531A1A1?

The lifespan of a leather strap depends on the quality of the tanning process, frequency of use, and maintenance. A quality vegetable-tanned calf strap, rotated with other straps and treated periodically with a neutral leather conditioner, can last between three and five years. Shell cordovan and alligator straps, due to the higher fibre density, generally offer greater longevity.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only