Blancpain · Le Brassus

Strap for Le Brassus Carrousel Répétition MInutes Chronographe Flyback Red Gold

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width23 mm
Case diameter45 mm
Reference2358-3631-55B
FamilyLe Brassus
MovementBlancpain caliber 2358 hours, minutes | Chronograph, column wheel, Flyback | minute repeater | Carrousel
Year2013
CaseRed Gold

Spring bar

Swiss Standard universal spring bars

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

The Le Brassus 2358-3631-55B, seen from the bench

The Blancpain Le Brassus 2358-3631-55B is a chronograph with minute repeater, perpetual calendar and carousel, mounted in 18-carat red gold with a 45mm case diameter. Powered by the Blancpain caliber 2358 beating at 4Hz, it features a column wheel chronograph mechanism, flyback function and minute repeater visible through the caseback. The 23mm lug width is specific to Le Brassus models with cases over 40mm and developed shoulders; precise measurement between lug holes is critical for strap compatibility and wearing comfort.

Frequently asked questions

What is the lug width of the Blancpain Le Brassus 2358-3631-55B?

The lug width of the Blancpain Le Brassus 2358-3631-55B is 23mm. This measurement is specific to Le Brassus models with cases over 40mm in diameter and particularly developed lug horns. Correct measurement is calculated by the distance between the centres of the lug holes. Tolerance must be rigorous: even a minimal deviation compromises aesthetics and wearing comfort on a 45mm case.

Which strap should I choose for the Blancpain Le Brassus 2358-3631-55B?

For the Le Brassus 2358-3631-55B in rose gold, we recommend alligator in vegetable tanning, which develops a patina over time that harmonises with rose gold. A refined alternative is shell cordovan in warm tones (cognac, burgundy), offering softness and natural luminosity. Vegetable-tanned calf in anilina finish is a contemporary choice in slate grey or black. Vulcanised rubber remains a functional option for dynamic contexts. Your choice should consider colour evolution over time and dialogue with the case finish.

How do I change the strap on a Blancpain Le Brassus?

Changing the strap on a Blancpain Le Brassus requires particular care given the sculpted 45mm case. Remove the old strap using a spring bar tool, positioning the lever carefully to avoid scratches on the rose gold case. Insert the new strap (23mm lug width) ensuring the lugs fully enter the lug holes. Verify that the strap is perfectly symmetrical relative to the case. If uncertain, entrust the task to a professional: on a watch of this complexity and value, precision is paramount.

Is a compatible aftermarket strap reliable for this watch?

A quality aftermarket strap for the Blancpain Le Brassus 2358-3631-55B is reliable provided the lug width is rigorously 23mm and the material is consciously chosen. Artisanal full-grain leather straps of superior quality (alligator, shell cordovan, calf) guarantee durability comparable to OEM straps. The difference lies in consultation: bespoke straps with warranty and qualified after-sales service remain the best alternatives to factory straps. Avoid generic straps without warranty: the watch's value deserves construction seriousness.

How long does a leather strap last on a Blancpain Le Brassus?

A quality leather strap on a Blancpain Le Brassus has an average lifespan of 3-5 years with daily wear, depending on material and maintenance conditions. Vegetable-tanned alligator and shell cordovan age better than calf, developing patina rather than degradation. Lifespan extends if the strap is removed at night and protected from excessive humidity. Factors affecting durability: wearing frequency, water contact, skin perspiration, UV exposure. An 18-month warranty on manufacturing defects is an indicator of reliable construction quality.

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