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Breitling · Chronoliner

Strap for Chronoliner Stainless Steel / Bronze / Calf

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Breitling
Lug width22 mm
Case diameter46 mm
ReferenceY2431033.Q621.439X
FamilyChronoliner
MovementBreitling caliber Caliber 24 Additional 24 Hour Hand (adjustable), Hours, Minutes, Small Seconds | Date | Chronograph
CaseCeramic, Stainless 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 Chronoliner Y2431033.Q621.439X

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronoliner Y2431033.Q621.439X, seen from the bench

The Breitling Chronoliner Y2431033.Q621.439X is a professional pilot's instrument watch designed for transcontinental routes. It features a 46mm stainless steel case with ceramic bezel insert, a 22mm lug width, and the automatic Breitling Caliber 24 movement with chronograph, GMT function with independent adjustable hand, small seconds, and date. The 24-hour dial scale enables immediate timezone reading, defining this as a GMT tool watch without compromise.

Frequently asked questions

What is the lug width of the Breitling Chronoliner Y2431033.Q621.439X?

The Breitling Chronoliner Y2431033.Q621.439X has a lug width of 22mm. This is the measurement to use when selecting any aftermarket strap compatible with this reference.

What is the best strap for the Breitling Chronoliner 46mm?

For a 46mm case with an aeronautical character, a vegetable-tanned calfskin strap with a pronounced grain or a padded alligator strap offer the best balance between instrumental purpose and elegance. A nylon NATO strap is ideal for daily sporting use.

How do you change the strap on a Breitling Chronoliner?

The strap is removed using a springbar tool to release the spring bars from the lugs. A fine-forked tool is recommended to avoid scratching the steel case and ceramic insert. The swap takes only a few minutes and requires no professional assistance.

Are there aftermarket straps compatible with the Breitling Chronoliner Y2431033.Q621.439X?

Yes. Any strap with a 22mm attachment width is compatible. milanostraps.it offers a curated selection of handcrafted 22mm straps in leather, alligator, rubber and nylon, specifically suited to the Chronoliner's 46mm case.

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

A quality vegetable-tanned leather strap, with regular conditioning (leather cream every 2–3 months and protection from prolonged water exposure), can last between 3 and 6 years. A deployant clasp reduces mechanical stress on the lug and significantly extends the strap's lifespan.

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