Tonneau XL CPCP Platinum Collection Privée Manual Wind 2026 Cartier Service | Ref. W1528152 / 2435E

The Story

The Collection Privée Cartier Paris, produced between 1998 and 2008, has become one of the most quietly significant chapters in modern watchmaking history. Created during a period when Cartier sought to reassert its credentials as a true haute horlogerie maison, the CPCP series revisited the maison's historic shaped case archetypes (Tank, Tortue, Tonneau, Cloche, Asymétrique) and executed them at the highest possible level. These were not commercial pieces. They were produced in low numbers, often fewer than a hundred examples per reference per metal, and sold primarily through the Cartier rue de la Paix boutique in Paris and a handful of authorised CPCP retailers worldwide. Today, the CPCP series is a reference point for serious Cartier collectors.

This particular example is a Tonneau XL in solid platinum, reference W1528152 (also catalogued as 2435E). The Tonneau is one of Cartier's earliest and most architecturally distinctive case shapes, originally introduced in 1906, and the XL execution in platinum during the CPCP era stands among the most refined interpretations the maison has ever produced.

The Craft

Where standard Tonneau references of the period were powered by ETA based calibres, the 2435E houses the Cartier Calibre 9790MC, a manual-wind movement based on a Jaeger-LeCoultre ébauche and specifically engineered as a shaped calibre to follow the curved geometry of the Tonneau case. This is not a round movement squeezed into a shaped case. It is a true tonneau-form calibre, hand-finished to CPCP standards. The dial carries the "Cartier Paris" signature beneath the brand name, the hallmark of CPCP provenance, executed with the deeper guilloché work that distinguishes Collection Privée pieces from standard production references. Blued steel sword hands and a sapphire cabochon crown complete the classical Cartier vocabulary.

Service and Condition

This example was recently fully serviced by Cartier in February 2026. The service included complete movement disassembly, cleaning, lubrication, regulation, refinishing, replacement components where required, and full pressure testing. The accompanying Cartier service documentation and warranty support represent a significant advantage for the next owner: the watch is ready to wear, calibrated to original specification, and supported by Cartier's own after-sales network. For a watch of this age and complexity, recent factory service from the manufacture is the gold standard of provenance.

The CPCP series has become one of the most collectible modern eras of Cartier, and the platinum Tonneau XL remains one of the purest expressions of Cartier's historic design language combined with true haute horlogerie movement pedigree. A serious collector's piece that rarely surfaces in this configuration.