Blancpain · Villeret

Strap for Villeret 8 Jours Red Gold / Bracelet

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
Reference6630-3631-MMB
FamilyVilleret
MovementBlancpain caliber 1335 hours, minutes, seconds | date
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 6630-3631-MMB, seen from the bench

The Blancpain Villeret 8 Jours Red Gold represents classical Swiss watchmaking excellence, embodying the values of the Villeret Manufactory founded in 1735. This model features a 42.00mm red gold case with manual-winding Blancpain caliber 1335, displaying hours, minutes, seconds, and date. The 23mm lug width accommodates its understated elegance and balanced proportions. Water-resistant to 30 meters with sapphire crystal and screw-down crown, the Villeret prioritizes timeless design and mechanical purity over contemporary complications.

Frequently asked questions

What is the lug width of the Blancpain Villeret 6630-3631-MMB?

The lug width of the Blancpain Villeret 6630-3631-MMB is 23mm. This measurement represents the external distance between the horizontal pins of the case and is critical for strap compatibility. A strap specifically sized at 23mm ensures perfect alignment with the case without lateral slippage or gaps. Always measure using a digital calliper between the metal lugs protruding from the case.

Which strap material is most suitable for the Blancpain Villeret 6630-3631-MMB?

Alligator represents the aristocratic choice: the natural texture of the dermal scutes harmonises organically with the rose gold case, and the leather resists humidity exceptionally well. Vegetable-tanned calf offers a patina that evolves generously over time, acquiring character and depth. Shell cordovan guarantees superior structural density and exceptional longevity, hardening nobly with wear. FKM rubber suits those requiring everyday versatility in humid environments.

How do I change the strap on my Blancpain Villeret 6630-3631-MMB?

Strap replacement occurs through extraction of the pins. Use a spring bar tool (a small lever implement with pointed tips) to gently lift the horizontal pins from their seats in the case. Insert the new strap by aligning the holes with the pins, then press the strap downward until it clicks. Never force: the pins must slide smoothly. If inexperienced, consult a professional watchmaker.

Are there aftermarket straps compatible with the 6630-3631-MMB?

Yes, any 23mm strap is mechanically compatible. However, quality varies significantly. We recommend artisanal straps in alligator, vegetable-tanned calf, or shell cordovan to preserve the watch's aesthetic integrity. Milano Straps offers a curated collection of 23mm straps, including bespoke models crafted by Casati Milano with personalised material selection.

How long does a leather strap last on my Blancpain Villeret?

Lifespan depends on material, climate conditions, and usage patterns. A premium alligator strap lasts 4–6 years under normal conditions. Vegetable-tanned calf is more vulnerable to humidity but lasts 3–5 years whilst developing a fascinating patina. Shell cordovan is the most durable: 5–8 years, maintaining structural integrity. Prolonged exposure to humidity, perspiration, and thermal fluctuation accelerates wear. Rotating between at least two straps extends the life of both.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only