Sinn Spezialuhren 613 St UTC

The Sinn 613 St UTC, reference 613.013, is a chronograph with a bead-blasted 41 mm steel case water resistant to 500 metres. A screw-down crown projects from the case, which measures 15 mm thick. Under sapphire crystal, the matt black dial has luminous hands beside the date, small seconds and second time zone. The movement is self-winding calibre SW535. Magnetic Field Protection guards against magnetisation, and Ar-Dehumidifying Technology reduces fogging. Minute ratcheting defines the captive rotating diver's bezel.