Cartier Santos de Cartier Medium 35.1mm Steel | Ref. WSSA0029 | 08/2026 Brand New Full Set

The Story

In 1904, Louis Cartier created a bespoke timepiece for his friend, the Brazilian aviation pioneer Alberto Santos-Dumont, who needed to tell time mid-flight without removing his hands from aircraft controls. In doing so, Cartier invented not only the world’s first purpose-built men's wristwatch but also the very first pilot's watch in history. The Santos de Cartier Medium (Ref. WSSA0029) represents the purest modern evolution of this milestone. Stripping away unnecessary complications to preserve pristine dial symmetry, this medium-size execution delivers unmatched proportions, bridging classical Parisian elegance with everyday sports versatility for the discerning purist.

The Craft: Ergonomic Steel Geometry, QuickSwitch & Calibre 1847 MC

The 35.1mm stainless steel case features an ultra-slender thickness of just 8.83mm, tapering seamlessly to hug the wrist beneath a formal cuff. The signature square bezel—adorned with eight functional polished screws—flows gracefully into the brushed case flanks. The multi-faceted winding crown is set with a synthetic faceted blue spinel.

The silvered opaline dial remains faithful to Cartier's timeless aesthetic codes, featuring bold black Roman numerals, an inner chemin-de-fer (railway) minute track, and luminescent-accented thermally blued-steel sword hands.

Beneath the solid caseback beats the Manufacture Cartier Calibre 1847 MC. Designed for modern mechanical reliability, this automatic engine operates at 28,800 vph with anti-magnetic nickel-phosphorus escapement components and a soft-iron internal shield. It provides a robust 100 meters (330 feet) of water resistance. The timepiece features Cartier's patented QuickSwitch system, allowing instantaneous, tool-free strap changes between the stainless steel bracelet and the included calfskin strap, while the SmartLink mechanism enables link removal in seconds with the press of a concealed button.

Condition & Fresh August 2026 Factory Warranty Package

This Santos de Cartier Medium is presented in Brand New / Unworn condition, completely free of wear, handling marks, or hairline scratches.

The timepiece arrives as a True Complete August 2026 Full Set, arriving with its iconic red Cartier presentation box, outer packaging, operating instructions, adjustment tool, additional original brown calfskin leather strap with deployant clasp, and the official international warranty card stamped and dated in August 2026 (eligible for extension up to 8 years under the Cartier Care program). Fully verified and backed by our 1-year Honeyrock mechanical warranty, this brand-new horological icon represents a turnkey daily luxury investment.