First introduced in 1923, the Cartier Tank Obus stands out as a bold departure from the traditional Tank design, offering a unique take on the iconic collection. Unlike the classic rectangular profile of the Tank, the Obus features a square case with distinctive bullet-shaped lugs—aptly named "Obus," meaning "shell" in French. These rounded lugs create a striking contrast against the sharp corners of the case, giving the watch its unmistakable character.

The present Rectangulaire à Pattes Vis Armurier showcases the Tank Obus' signature design with a modern twist. Crafted in white gold, it features faceted diamonds on the lug screws, a silver guilloché dial with chemin de fer and "Paris" signature, and a sleek black enamel bezel adorned with Roman numerals. Powered by a manual-wind movement, this elegant timepiece blends Cartier’s timeless sophistication with a contemporary edge. The caseback is inscribed with a "double eagle head's" hallmark, which indicates the case material to be determined as white gold; this hallmark was used in France from 1919 to 1994, further adding to its desirability. Preserved in excellent overall condition, this rare and captivating Cartier is a true collector’s piece, certain to draw admiration from enthusiasts of the Maison’s most distinctive designs.