Introduced in the 1980s and flourishing through the 1990s, the Must de Cartier 21 is a masterclass in avant-garde Parisian design. It was created to offer a contemporary, sporty alternative to the classic Tank, blending the Maison’s jewelry DNA with a bold, circular architecture. The most striking feature of this timepiece is the "extrospective" dial—where the iconic Roman numerals are engraved directly onto the wide, satin-finished bezel, surrounding a minimalist inner dial. This steel and gold-accented version remains a definitive symbol of 1990s luxury. Brand: Cartier Model: Must de Cartier 21 Movement: Quartz (Cartier Calibre 690) Case Diameter: 28 mm (excluding crown) Case Material: Stainless Steel & Gold Accents Bracelet: Integrated Steel and Gold-accented bracelet Dial: Silvered with blued steel hands Glass: Sapphire Crystal Functions: Hours, Minutes Box/Papers: Not included The Must de Cartier 21 has recently transitioned into a highly sought-after "neo-vintage" classic. Its design is instantly recognizable, making it a statement piece that balances Cartier's formal elegance with a modern, utilitarian edge. At 28 mm, it offers a sophisticated presence on the female wrist and represents a sound entry point or addition to a high-end collection.