Santos-Dumont Reinterpreted: Obsidian, Gold, and 120 Years of Cartier

The Collector’s View

• The new Santos-Dumont LM features a dial in gilded obsidian — a volcanic stone from Mexico, cut to just 0.3 mm — making every piece entirely one-of-a-kind.
• A 394-link yellow gold flexible bracelet, inspired by the Maison’s 1920s metal bracelet tradition, is engineered from 1.15 mm-thick links across 15 rows.
• The 430 MC hand-wound manufacture movement powers all new LM-size references, housed in a 43.5 × 31.4 mm case with 7.3 mm thickness.
• The range expands with three LM variants: gilded obsidian in yellow gold, silvered satin-finish sunray in yellow gold, and silvered satin-finish sunray in platinum.

A Design Lineage That Began in 1904

The Codes of the Original

When Cartier created the Santos watch in 1904 at the request of Brazilian aviation pioneer Alberto Santos-Dumont, the brief was functional: a timepiece readable mid-flight, worn on the wrist rather than carried in a pocket. That original object introduced codes that remain unaltered today — Roman numerals, exposed screws on the bezel, a circular-grained crown, and the blue cabochon that has become one of the Maison’s most recognisable signatures.

This new LM-size iteration does not merely preserve those codes; it channels the dandyism of Santos-Dumont himself, a figure as famous for his impeccable Parisian dress as for his aeronautical achievements. As Pierre Rainero, Cartier‘s Director of Image, Style and Heritage, states: “The new Santos-Dumont emphasises its resemblance to the original shape, and the bracelet, at once fluid and precious, is an expression of contemporary elegance.”

Vintage Accents, Contemporary Craft

What distinguishes this version is the deliberate accumulation of vintage references filtered through thoroughly modern manufacture capabilities. The watch sits within a long editorial tradition of revisiting founding objects — a conversation that collectors following Cartier’s output at Watches and Wonders will recognise immediately.

The Obsidian Dial and the Gold Bracelet

Gilded Obsidian — A Feat of Gem-Cutting

The centrepiece of the most distinctive new reference is its dial in gilded obsidian. Sourced from Mexico, this volcanic stone owes its shifting, iridescent quality to microscopic air bubbles locked inside the material during formation. No two stones carry the same distribution of bubbles, so no two dials will ever appear identical — a rare proposition in a product category that prides itself on precision and repeatability.

At 0.3 mm in depth, the stone approaches the structural fragility of glass, demanding exceptional skill from the Manufacture’s craftsmen through every stage: cutting, polishing, and final assembly. The result is a surface that reflects light with a depth that no lacquered or even enamelled dial can replicate.

The Architecture of the Bracelet

The yellow gold bracelet deserves equal attention. Drawing on the Maison’s own history — the first made-to-measure metal watch bracelets developed in the 1920s — the current design achieves a silky movement against the skin through the refinement of its 1.15 mm links. Fifteen rows, 394 links in total, machined and finished at the Manufacture, then assembled and attached to both case and clasp as a single coherent object. This is the kind of detail that places the Santos-Dumont firmly within the lineage of Cartier’s high jewellery craft, not merely its watchmaking division — a duality also visible in pieces such as the Haryana necklace.

Movement, Specifications, and the Full Range

The 430 MC Manufacture Calibre

All three new LM-size references are driven by the 430 MC, a hand-wound mechanical movement developed and produced at the Cartier Manufacture. The case measures 43.5 × 31.4 mm with a 7.3 mm profile — proportions that preserve the elongated, cushion-inflected geometry of the original Santos-Dumont and remain elegant against a tailored cuff. Water resistance is rated to 3 bar (approximately 30 metres).

Three References, One Vocabulary

Beyond the obsidian reference, the LM range introduces two further models: a yellow gold case paired with a silvered satin-finish dial carrying a sunray effect, and a platinum case with the same dial treatment. The platinum version, executed in 950/1000 platinum, offers the cooler tonal contrast that a section of the GCC collector market has consistently favoured for formal wear. All models feature interchangeable bracelets, consistent with the Santos family’s longstanding commitment to wearability across contexts.

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