Sinn Watch EZM 3 Silicone603.010 Silicone. This diving watch has been designed for functioning in the harshest of conditions, including extreme cold. The watch cavity is filled with argon and a dehumidifying capsule has been added, both protecting the mechanism against moisture and oxygen intrusion. Because of these special characteristics, the EZM 3 diving watch can operate flawlessly at temperatures ranging from 45 to 80 degrees Celsius. Additional features include magnetic resistance, diver's bezel with minute ratcheting, crown on the left side of the case, high and low pressure resistance, luminous hands and markers and scratch resistant sapphire crystal glass with anti reflective coating.