Breitling · Colt

Strap for Colt 41 Automatic Stratus Silver / Calf

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
ReferenceA1731311.G820.425X
FamilyColt
MovementBreitling caliber Caliber 17 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Colt A1731311.G820.425X, seen from the bench

The Colt represents Breitling's sporty line characterized by essential functions and robustness. It features the Breitling 17 caliber with hour, minute, second and date indication. The 20mm lugs complete the technical configuration of the model.

Frequently asked questions

What is the lug width of the Breitling Colt A1731311.G820.425X?

The lug width of the Breitling Colt A1731311.G820.425X is 20mm. This measurement is taken between the two case horns, flush with the bezel, excluding the thickness of the lugs themselves. Respecting this figure is essential to ensure a precise fit with no lateral play.

What is the best strap for the Breitling Colt A1731311.G820.425X?

For the Breitling Colt A1731311.G820.425X, the most suitable options are: flat-scale alligator with vegetable tanning for a tailored register, shell cordovan for those seeking a personalised patina over time, vulcanised rubber for sporting use, and ballistic nylon NATO for a field-watch aesthetic consistent with the Colt family heritage. The choice depends on the intended context and dial colour.

How do you change the strap on a Breitling Colt A1731311.G820.425X?

To replace the strap on the Breitling Colt A1731311.G820.425X, use a fine-tipped or forked spring bar tool. Insert the tool into the spring bar slot between the lugs, compress laterally and slide the bar out. Work one side at a time. Place the dial face-down on a soft cloth to avoid scratching. No specialist watchmaker tools are required for this operation.

Are there aftermarket straps compatible with the Breitling Colt A1731311.G820.425X?

Yes, the Breitling Colt A1731311.G820.425X features standard 20mm lugs, making it compatible with any aftermarket strap produced for this width. Milanostraps.it offers a selection of handcrafted leather, rubber and textile straps calibrated for 20mm lug widths, typically with an 18mm buckle end to suit the watch's geometry.

How long does a leather strap last on a Breitling Colt A1731311.G820.425X?

The longevity of a leather strap depends on material quality and frequency of wear. A vegetable-tanned alligator strap of artisanal quality, worn daily with normal rotation, typically lasts between two and four years before showing significant wear at the buckle end. Shell cordovan, owing to its dense fibre structure, generally offers a longer service life. Avoiding prolonged exposure to water and perspiration extends durability considerably.

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