This timepiece is a magnificent artifact of Swiss engineering, hailing from the line that introduced the world’s first scratchproof watch. The Rado DiaStar, reference 111.0156.3, is defined by its iconic square-shaped case made of tungsten carbide, a super-hard material that gives the watch its signature mirror-like luster and incredible durability against the test of time. It features a deep black dial elevated by sparkling crystal/diamond-style hour markers, creating a high-contrast luxury aesthetic that is quintessential Rado. The watch is powered by a high-grade Swiss Quartz movement, likely an ETA 956 base, which was chosen for its extreme precision and ultra-slim profile, allowing the watch to sit with effortless elegance on the wrist.

The aesthetic is further enhanced by the integrated stainless steel bracelet featuring raised geometric "pyramid" links, a design hallmark that flows seamlessly from the architectural case. The dial layout is perfectly balanced with a discreet date window at 3 o'clock and the famous gold Rado anchor logo. Flipping the watch over reveals the deeply engraved caseback with the "SCRATCHPROOF" and "WATERSEALED" designations, alongside the serial number 19031595, confirming its authentic Swiss lineage. This is an essential acquisition for a collector who appreciates avant-garde material science, bold geometric design, and the enduring prestige of the Rado DiaStar legacy.