Cartier Tank Obus - 18K Yellow Gold omega and design innovation—an extraordinary reference

and design innovation—an extraordinary reference that transcends traditional watchmaking and flirts with high jewelry territory

This reference matters because it bridges the gap between the vintage 5513 and the modern ceramic references

Matching patina in both hands and hour markers

Stainless steel case and caseback

Cartier Tank Obus - 18K Yellow Gold omega and design innovation—an extraordinary referenceThe Quadrant Enamel Classic The Cartier Tank Obus is a distinct departure from the elongated rectangles typically associated with the brand. This 1980s execution, often referred to as the "Quadrant," utilizes a perfectly square 20x20mm 18k yellow gold case. What sets this specific reference apart is the bezel; rather than leaving the gold plain, Cartier inlaid it with black enamel Roman numerals. This design choice pushes the hour markers to the