Blancpain · Villeret

Strap for Villeret Quantieme Complet 8 Jours Red Gold / White

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
Reference6639-3642-55B
FamilyVilleret
MovementBlancpain caliber 6639 Hours, Minutes, Small Seconds | Date, Day, Month | Moonphase
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 6639-3642-55B, seen from the bench

The Blancpain Villeret 6639-3642-55B is a 42mm red gold case classic Swiss timepiece featuring the in-house Blancpain 6639 manual-wind caliber. The watch displays hours, minutes, small seconds, date, day, month, and moonphase on a dial protected by a sapphire caseback revealing Côtes de Genève finishing. The 23mm lug width ensures optimal proportions and strap compatibility for this elegant, timeless Villeret model.

Frequently asked questions

What is the lug width of the Blancpain Villeret 6639-3642-55B?

The lug width of the Blancpain Villeret 6639-3642-55B is 23mm. This measurement is specific to this reference and determines compatibility with aftermarket straps. A 23mm strap fits perfectly onto the case lugs, ensuring secure attachment and balanced aesthetics. It is essential to verify this dimension before purchasing a replacement strap.

Which strap material pairs best with the Villeret 6639-3642-55B in rose gold?

For a Blancpain Villeret in rose gold, the most suitable materials are American alligator tanned in deep tones (chocolate brown, deep burgundy) and vegetable-tanned calf leather in natural tan hues. Alligator enhances the luxurious character of the precious case, whilst vegetable-tanned calf emphasizes the timeless elegance of the design. We recommend against sporty materials such as rubber or NATO straps for this model, which require stricter aesthetic austerity.

How do you change the strap on a Blancpain Villeret 6639-3642-55B?

The Blancpain Villeret 6639-3642-55B features a standard buckle with deployante, not spring bars. Strap removal is straightforward: unlock the deployante from the underside of the case (usually with a small lever), then slide the strap outward. Installation of the new strap follows the reverse process. We recommend performing this operation on a soft surface to prevent damage to the rose gold case.

Is the Blancpain Villeret 6639-3642-55B compatible with aftermarket straps?

Yes, it is fully compatible with aftermarket straps measuring 23mm lug width. However, the strap's construction quality must match the refinement of the watch. We recommend straps crafted with noble materials such as alligator, shell cordovan, or calf leather, produced by artisans specialising in haute maroquinerie. Avoid inferior quality straps, which would compromise the wearing experience and longevity of the fastening system.

How long does a leather strap last on a watch like the Villeret 6639-3642-55B?

Leather strap longevity depends on usage intensity and material quality. A strap made from premium American alligator or shell cordovan, crafted by a skilled artisan, provides a usable life of 5–7 years with regular wear. Vegetable-tanned calf leather offers similar durability, though patina will develop more noticeably over time. Proper care (avoiding prolonged moisture exposure, occasional conditioning) significantly extends lifespan. Casati Milano offers an 18-month warranty against manufacturing defects and provides guidance on strap maintenance.

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