Technical Archive

Breitling
Colt A1731311.BE90.225S— lug 20mm

Breitling Colt A1731311.BE90.225S: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Colt 41 Automatic Volcano Black / Rubber

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Breitling A1731311.BE90.225S
Lug Width
20 mm

The essential strap measurement.

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Reference

A1731311.BE90.225S

Movement

Breitling caliber Caliber 17 Hours, Minutes, Seconds | Date

The Heritage

The Breitling Colt is equipped with the Caliber 17 with hour, minute, second, and date functions. The model features 20mm lug width straps. The A1731311.BE90.225S reference belongs to the Swiss brand's sports collection.

FAQ

What is the lug width of the Breitling Colt A1731311.BE90.225S?

The Breitling Colt A1731311.BE90.225S has a lug width of 20mm. This measurement should be taken with a calliper between the two lugs at the lower end of the case, where the strap attaches. The buckle end width typically tapers to between 16mm and 18mm depending on the strap model selected.

What is the best strap for the Breitling Colt A1731311.BE90.225S?

For the Colt A1731311.BE90.225S with its 41mm stainless steel case, a vegetable-tanned alligator or grain calf leather strap best complements the watch's technical aesthetic. For sporting use, vulcanised rubber or ballistic nylon NATO straps are preferable for durability and comfort. A stainless steel deployant clasp rounds off the pairing with material consistency.

How do you change the strap on a Breitling Colt A1731311.BE90.225S?

To replace the strap on the Colt A1731311.BE90.225S, use a spring bar tool or a fine flat-head screwdriver to remove the spring bars securing the strap to the lugs. Care must be taken to avoid scratching the stainless steel case. If in doubt, it is advisable to consult a watchmaker or visit the Casati Milano atelier.

Are there aftermarket straps compatible with the Breitling Colt A1731311.BE90.225S?

Yes, any strap with a 20mm lug width is compatible with the Breitling Colt A1731311.BE90.225S. Milanostraps.it offers a curated selection of handcrafted leather, rubber and textile straps in this size, with customisation options covering material, colour, stitching and clasp type.

How long does a leather strap last on a Breitling Colt A1731311.BE90.225S?

The lifespan of a leather strap depends on the quality of the hide, the tanning method and daily wear conditions. A high-quality vegetable-tanned alligator or shell cordovan strap can last between three and seven years with regular maintenance — periodic cleaning and application of a leather conditioner. Prolonged exposure to water and perspiration significantly reduces service life; rubber or NATO straps are recommended for intensive use.