EZM 2

The Sinn EZM 2 was developed in close collaboration with Germany’s elite maritime unit, the GSG 9, as a mission timer engineered for unforgiving conditions. Its left-hand crown, legible dial, and anti-magnetic case were tailored for operational reliability, making it a cult favorite among tool watch aficionados. The EZM 2’s origin as an issued instrument, rather than a commercial design exercise, sets it apart from most dive watches in the Sinn lineup.

Reference 403.EZM2 houses the automatic ETA 2824-2 movement, chosen for its proven durability and ease of service. The 41mm bead-blasted steel case features Sinn’s signature Ar-Dehumidifying Technology and is rated to 300 meters, with a captive bezel and integrated crown protection. Earlier examples have “GSG 9” on the dial, while later civilian versions drop the unit marking—these details drive collector interest and price, with issued pieces commanding a premium.

Condition is a key value driver, as many EZM 2s saw real-world use and show honest wear. Originality matters: look for correct tritium hands and dial on early models, and confirm the presence of the special caseback engraving. The model’s short production run and direct link to German special forces make it a compelling buy for those seeking a purpose-built, historically significant diver with a practical, serviceable movement.