First introduced in 1997, the Sinn EZM 1 established itself as one of the most purpose-built professional chronographs ever created. Designed in collaboration with Germany's Central Customs Support Group (ZUZ), the watch was conceived as a genuine mission timer, where clarity, durability and reliability took precedence over aesthetics. Every aspect of its design—from the left-hand crown to the highly legible chronograph display—was developed around the practical requirements of professionals operating in demanding, time-critical environments. It quickly became one of Sinn's defining models and remains one of the most respected modern tool watches ever produced.

Released in 2017 to celebrate the twentieth anniversary of the original, the EZM 1.1 continues that philosophy in a limited edition of just 500 pieces. While preserving the distinctive appearance of its predecessor, it introduces Sinn's in-house SZ01 chronograph movement, developed to recreate the exceptional readability of the legendary Lemania 5100 with its centrally mounted 60-minute chronograph display. Combined with Sinn's proprietary technologies—including TEGIMENT surface hardening, Ar-Dehumidifying Technology and operation from -45°C to +80°C—the EZM 1.1 is not simply inspired by professional equipment; it is professional equipment.

Watch is in overall like-new condition. The case shows only light signs of wear or handling. It is fitted with a rubber strap that fits approximately a 7” wrist. Comes with original box and papers with spare leather strap.