Blancpain · Villeret

Strap for Villeret Demi-Fuseau Horaire 8 Jours Red Gold / Enamel

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

Lug width22 mm
Case diameter40 mm
Reference6661-3631-55B
FamilyVilleret
MovementBlancpain caliber 5235DF Hours, Minutes, Additional 24 Hour Hand (adjustable), Additional 12 Hour Hand (adjustable), Day / Night Indication | 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

Straps for the Villeret 6661-3631-55B

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Villeret 6661-3631-55B, seen from the bench

The Blancpain Villeret Demi-Fuseau Horaire 8 Jours 6661-3631-55B features a 40mm red gold 18K case embodying pure watchmaking philosophy. The manual-winding caliber 5235DF includes power reserve indicator, adjustable 24-hour GMT function, secondary 12-hour hand, and day/night indication. With 22mm lug width, this dress watch balances robustness and wearability without decorative excess, representing Blancpain's uncompromising heritage since 1735.

Frequently asked questions

What is the lug width of the Blancpain Villeret 6661-3631-55B?

The lug width of the Blancpain Villeret 6661-3631-55B is exactly 22 millimetres. This measurement is taken between the two terminal bars (the metal projections on the case) where the strap attaches. Accurate measurement with a digital calliper is essential before ordering a compatible strap, as even slight deviations will cause incompatibility.

Which strap material is recommended for the Villeret 6661-3631-55B?

For the Villeret 6661-3631-55B, leather is the material of choice. Alligator represents the most elegant and classical option, featuring regular grain texture and developing a desirable patina over time. Shell cordovan offers superior wear resistance and natural lustre. Vegetable-tanned calf leather suits those appreciating natural ageing and sustainability. NATO textile and FKM rubber are contemporary alternatives for informal contexts.

How do you change the strap on a Blancpain Villeret?

The Villeret 6661-3631-55B utilises standard spring bar attachment. Changing the strap requires a spring bar tool to extract the elastic pins holding the strap to the case lugs. It is a straightforward operation but demands care to avoid scratching the rose gold case. If you prefer professional assistance, Casati Milano offers a dedicated strap-changing service.

Does an aftermarket strap damage the Blancpain watch?

No, not if correctly manufactured to specification. A high-quality aftermarket strap poses no risk to the Villeret if produced to exact lug width specifications (22mm in your case) and mounted with care. Casati Milano's bespoke straps are manufactured to millimetre tolerances, ensuring perfect compatibility without stressing the case lugs.

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

Strap longevity depends on material and usage patterns. Quality alligator or shell cordovan typically lasts 3-5 years with moderate daily wear before replacement becomes necessary. Vegetable-tanned calf ages faster but develops a desirable patina. Casati Milano provides an 18-month warranty on manufacturing defects, and all leather sourced is of premium grade to extend strap 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