Design Icon: Introduced in 1996, the Tank Française modernized the classic 1917 Tank blueprint by seamlessly integrating a tank-track-inspired link bracelet directly into the curved case brancards.Signature Elements: Features traditional black Roman numeral hour markers, a signature chemin de fer (railway) minute track, blued-steel sword hands, and a faceted crown set with a blue sapphire cabochon.Material: Built entirely from 18K yellow gold (750/1000) across both its angular case and structural monobloc bracelet