Cartier Tank Obus - 18K Yellow Gold

The 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 bezel, allowing the white dial to remain open and minimalist. It is a sophisticated, geometric take on the Tank lineage that feels more like a piece of stationary architecture than a standard timepiece

A Rare Geometric Execution

In the world of vintage Cartier, the Obus occupies a niche space for collectors who appreciate "shaped" watches. The square proportions give it a stout presence on the wrist despite its refined dimensions. The contrast between the high-polish 18k yellow gold and the crisp black enamel creates a graphic intensity that is signature to Cartier’s early 20th-century design language, revived here for the 1980s. It is a configuration that prioritizes the case's silhouette, making the bezel the primary dial while the internal white face serves as a clean, secondary backdrop.

Sharp Gold And Preserved Enamel

The 18k yellow gold case is in good condition, maintaining its sharp square corners and the distinct "bullet" lugs that give the Obus its name. Crucially, the black enamel Roman numerals on the bezel are well-preserved, retaining their deep pigment and clean edges. The white dial is excellent, showing no signs of spotting or degradation. The watch is currently fitted to a leather strap with an aftermarket buckle. Mechanically, the watch is being sorted for a fresh battery as part of our intake process runs great.

A Sophisticated Square Alternative

This is a watch for the Cartier enthusiast who already owns a Tank Louis or a Santos and wants something more obscure. The Tank Obus offers a level of vintage charm and geometric character that is hard to find in modern catalogs. It functions as a formal dress watch with a heavy lean toward jewelry, offering a look that is both historically grounded and visually unique. It is a rare, intentional design that remains one of the most interesting "hidden" references in the Cartier archive.