The Cartier Tank Cintrée Skeleton — known in French as the Tank Cintrée Squelette — is a skeletonised variant of one of Cartier's most architecturally distinctive wristwatches. Where the standard Tank Cintrée is already an exercise in elongated, gently curved restraint, the skeletonised version adds a further dimension: the movement itself is opened out, its bridges and plates cut away to reveal the mechanical workings within, while retaining the structural logic and visual language of the case that surrounds them. Produced in limited numbers under the Collection Privée Cartier Paris (CPCP) programme during the late 1990s and early 2000s, these pieces occupy a singular position in the collector market — technically demanding, historically grounded, and unmistakably Cartier in their aesthetic sensibility.

Origins of the Tank Cintrée

The Tank family of watches was conceived by Louis Cartier in 1917, with the first examples delivered in 1919. The design drew its proportions from the overhead silhouette of the Renault FT tank then deployed on the Western Front — the parallel side rails of the track assembly translated directly into the brancards, or side bars, that define every Tank case to this day. The Cintrée variant — cintré meaning curved or arched in French — appeared in 1921 as a deliberate departure from the rectangular flatness of the original Tank. Its case is both elongated along the vertical axis and gently curved along its length to follow the curvature of the wrist, producing a profile that is simultaneously more formal and more sculptural than its forebear. Case lengths on the Cintrée can exceed 45 mm, making it one of the longest wristwatch cases in the classical canon, yet its narrow width — typically around 15 to 17 mm — preserves an extreme slenderness that reads as elegance rather than excess.

The Art of Skeletonisation

Skeletonisation, or squelettage, is the craft of removing all non-essential material from a watch movement — the mainplate, bridges, and sometimes even the barrel and wheel cocks — until only the structural minimum required to hold the gear train, escapement, and spring in correct alignment remains. The resulting openwork movement, when viewed through a transparent or absent dial, reveals the full choreography of the mechanism: the oscillation of the balance wheel, the controlled release of the escapement, the slow rotation of the going train.

The technical challenge of skeletonising a movement intended for a shaped case such as the Cintrée is considerably greater than for a round or standard rectangular calibre. The movement must conform to the case's elongated and curved geometry, meaning that the bridges and plates are themselves non-standard in outline. Removing material from these already-constrained components without compromising rigidity demands precise calculation and, in the case of hand-finished CPCP pieces, a high degree of manual intervention. The bevelled and polished edges that are the hallmark of fine skeletonisation — each anglage cut by hand and brought to a mirror finish — must follow contours that offer little margin for error.

Cartier's approach to skeletonisation in the CPCP Cintrée retained the maison's characteristic decorative vocabulary: the Roman numerals of the chapter ring, the blued-steel sword-shaped hands, and the overall architectural clarity of the Tank aesthetic were preserved even as the movement beneath was opened to view. The result is a watch in which the mechanical and the decorative are not in tension but in dialogue.

The Collection Privée Cartier Paris

The CPCP was established in the late 1990s as Cartier's vehicle for producing historically informed, high-complication, and artisanally finished timepieces in small series. The programme drew explicitly on the maison's archival heritage, revisiting forms — the Tank Cintrée, the Tortue, the Cloche, the Santos-Dumont — that had defined Cartier's watchmaking identity in the early twentieth century and reinterpreting them with contemporary finishing standards and, in many cases, in-house or specially developed movements.

CPCP pieces were produced in platinum as the default precious metal, a choice that reinforced both the programme's prestige positioning and its visual coherence: platinum's cool grey tone complements the blue of the hands and the silvered openwork of a skeletonised movement with particular harmony. Yellow gold and white gold variants were produced in some references, but platinum examples are generally considered the canonical expression of the CPCP Tank Cintrée Skeleton.

Production numbers for individual CPCP references were not always formally disclosed, but the programme as a whole was understood to operate at the level of a true limited series rather than a commercial catalogue line. The CPCP was formally discontinued in the mid-2000s, which has had the predictable effect of concentrating collector interest and supporting secondary-market values for the pieces it produced.

Case, Dial, and Movement

The Tank Cintrée Skeleton produced under the CPCP typically features a platinum case of the characteristic elongated and curved form, with the brancards integrated into the case body in the manner established by the original Cintrée. The crown is set with a cabochon sapphire — a Cartier signature detail — and the case is secured by a deployant or pin buckle on a leather strap, usually in dark tone to complement the platinum.

The dial, in the skeletonised version, is effectively replaced by the movement itself: the chapter ring carrying the Roman numeral hour markers is retained as a frame, but the centre is open, allowing an unobstructed view of the calibre. The blued-steel hands — a reference to the hand-finishing tradition in which steel was tempered to a blue oxide finish for both beauty and corrosion resistance — are among the most recognisable elements of Cartier's horological identity and are preserved in the Skeleton variant.

The movement is a manually wound calibre, skeletonised and decorated with Côtes de Genève striping on the visible surfaces, anglage on all edges, and polished steel on the screws and pivots. The balance wheel oscillates at a frequency consistent with the watchmaking conventions of the period, and the power reserve is typically in the range of 36 to 48 hours, appropriate for a dress watch of this type.

Collector Context and Market Position

Among collectors of vintage and limited-series Cartier, the CPCP Tank Cintrée Skeleton is regarded as one of the programme's most technically and aesthetically ambitious offerings. Its appeal rests on several converging factors: the historical prestige of the Cintrée form, the rarity of the skeletonised variant, the quality of finishing associated with CPCP production, and the intrinsic visual drama of a skeletonised movement housed in so extreme a case geometry.

At auction, CPCP Tank Cintrée Skeleton examples in platinum have achieved prices well above their original retail values, reflecting both the general appreciation of CPCP pieces in the collector market and the specific scarcity of the Skeleton variant. Condition, completeness of box and papers, and the presence of the original strap and buckle are the principal factors influencing individual realisations.

The watch is worn on the wrist as a dress piece rather than a sports or everyday instrument. Its proportions — long, narrow, and curved — suit a slender wrist and a formal sleeve, and it reads most naturally in the context for which the Cintrée was always intended: as a refined object that announces its wearer's familiarity with the deeper history of the maison that made it.

Further Reading

• Cartier — Tank Collection (cartier.com)