Blancpain · Villeret

Strap for Villeret 8 Jours Manuelle Red Gold / Enamel

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

Lug width23 mm
Case diameter42 mm
Reference6613-3631-55B
FamilyVilleret
MovementBlancpain caliber 13R0 Hours, Minutes, Seconds | Date | Power Reserve Indicator
CaseRed Gold

Spring bar

Swiss Standard universal spring bars

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

The Villeret 6613-3631-55B, seen from the bench

The Villeret features the Blancpain 13R0 caliber with indication of hours, minutes, seconds, date and power reserve. The model reference 6613-3631-55B has 23mm lugs. The Villeret collection represents the classic line of the Swiss brand with traditional complications.

Frequently asked questions

What is the lug width of the Blancpain Villeret 6613-3631-55B?

The Blancpain Villeret 6613-3631-55B features a lug width of 23mm. This measurement is specific to the 42mm Villeret models and is determined by the case proportions. To verify strap compatibility, measure the distance between the inner shoulders of the spring bar lugs—it must be exactly 23mm.

Which strap material pairs best with the Villeret 6613-3631-55B?

Polished or dyed alligator is the most elegant choice for the rose gold Villeret: the consistent grain does not compete with the case but complements it. Shell cordovan, alternatively, offers enviable patina development and visible ageing over time. For versatility, vegetable-tanned calf leather provides softness and authentic tannin character.

How do you change the strap on a Blancpain Villeret?

The strap is removed by gently extracting the lateral pins from the case using a dedicated spring bar tool. The pins pass through the case lugs and are held in place by internal springs. Insert the new strap by aligning the internal holes with the pins, then repress until they click into position. Exercise care to avoid scratching the case during this operation.

Is a 23mm Villeret strap compatible with other watches?

Yes, a 23mm strap is compatible with any watch featuring the same 23mm lug width, regardless of brand. However, aesthetic proportion may vary depending on the case diameter and overall style. A strap designed for the Villeret retains elegance on other dress watches of similar calibre.

How long does a leather strap last on a watch like the Villeret?

Leather strap longevity depends on usage frequency, leather quality, and environmental conditions. High-quality alligator, worn daily, typically lasts 3–5 years. Shell cordovan, owing to structural robustness, may exceed 7 years. Vegetable-tanned leather ages more rapidly (2–4 years) but acquires desirable patina. Casati Milano provides an 18-month warranty against manufacturing defects.

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