The Must 21 de Cartier Reference 1330 (31mm Medium, Two-Tone Stainless Steel with a Silver Dial) is a defining luxury timepiece from the 1980s and 1990s. It is celebrated for bridging the gap between sporty aesthetics and classic jewelry styling.

• Case Size & Thickness: 31 mm diameter (often designated as medium or unisex) with an ultra-slim depth of roughly 4 mm to 5.6 mm.

• Movement Type: High-precision Swiss Quartz (typically utilizing the reliable Cartier Calibre 690).

• Dial Aesthetic: Pristine silver or grey sunburst finish decorated with an inner minute track and the iconic central Cartier logo.

• Hands: Signature sword-shaped hands crafted in tempered blued steel.

• Crown: Circular-grained stainless steel crown set with a synthetic blue spinel cabochon.

• Bezel: Distinctive, wide brushed-steel fixed bezel engraved with bold gold-plated Roman numerals.

• Bracelet: Features the iconic "Rouleaux" (bullet-style) integrated design combining solid stainless steel and gold plating, secured by a hidden deployment butterfly clasp.

• Crystal & Resistance: Equipped with scratch-resistant sapphire crystal glass and splash-proof water resistance up to 30 meters.