This 1931 IWC Art Deco Tank presents an elegant slice of early 20th-century watch design, its proportions and stepped caselines reflecting the restrained geometry of the era. The rectangular form and clean dial treatment emphasize architectural clarity and wearable refinement. Powering the piece is IWC’s Cal. 87, a movement that speaks to the firm’s technical capabilities during the period and its focus on precise, small-form calibres. For the contemporary collector, the watch offers historical character and craftsmanship as part of a vintage dress-watch wardrobe sensitive to both design and movement provenance.