Expanding on the original Must de Cartier of the 1980s, the Must 21 reference 1340 features a 31mm stainless steel case paired with Cartier's signature two-tone Godron bracelet in steel and 18K yellow gold. The silver dial showcases blue steel sword hands and is framed by a polished steel bezel with applied 18K gold Roman numerals. An 18K yellow gold crown set with a blue cabochon completes the case. Secured by a hidden single-fold deployant clasp, the Godron bracelet delivers Cartier's 1990's aesthetic without compromise. Powered by Caliber 690, Cartier's 7-jewel Swiss quartz movement, it embodies the Must line ethos: accessible luxury engineered for daily wear.