Cartier · Clé de Cartier

Strap for Clé de Cartier 40 Pink Gold / Silver

Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.

Integrated bracelet

The Cartier Clé de Cartier WGCL0004 is designed with a bracelet integrated into the case. For a compatible made-to-measure strap, the Casati Milano atelier builds it on your watch.

Case diameter40 mm
ReferenceWGCL0004
FamilyClé de Cartier
MovementCartier caliber 1847 MC hours, minutes, seconds | date
Year2015
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

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

The Clé de Cartier WGCL0004, seen from the bench

The Clé de Cartier 40 is a luxury timepiece featuring a 40mm case in 18k pink gold with an integrated crown design. This model combines architectural design with horological precision, representing Cartier's approach to watchmaking as temporal jewelry. The watch requires custom strap solutions tailored to its integrated attachment system.

Frequently asked questions

Can you fit a standard strap on the Cartier Clé de Cartier WGCL0004?

No, the bracelet on this model is integrated into the case — there's no standard lug where you can slip a strap. I've seen owners looking for universal solutions: they don't work here. To change the strap, you need workshop intervention, where we build something precise for the watch you own.

How does a custom strap work for the Clé de Cartier?

We work only at <a href="/pages/casati-booking">Casati Milano</a>, by appointment. I take the watch in hand, measure directly on the case the integrated attachment point, and shape the strap so the transition is invisible. It's the only way to do something respectful with an object built like this.

Which leather do I recommend for this model?

The Clé has both a sporty and elegant character — it hovers between the two. I prefer alligator or crocodile tinted naturally, or aged calf that develops patina over time. The leather must breathe with the rose gold, not compete. I rule out heavy varnishes and industrial finishes.

How long does a well-made strap last?

A strap crafted with care lasts between 5 and 8 years of daily wear, depending on how you treat it. Leather ages, marks, softens — that's its language. If you remove it when you sleep and keep it away from fresh water, it can last 10 years. It's not eternal, but it speaks.

Why is the key crown on the WGCL0004 so important to the design?

It's not a jewel added for luxury. The key set into the rose gold case is the code that reads the entire object — it's Cartier telling you how it designs. That's why the strap must be equally considered: it enters into dialogue with that key, with those proportions. A makeshift strap betrays the entire architecture.

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