Sinn Diving Chronograph EZM 13 613.01

Einsatzzeitmesser is German for mission timer, and Sinn uses the label for watches built for professionals such as divers, pilots, firefighters and special forces. The EZM 13 pairs a chronograph with a 0 to 60 diving bezel in a 15 mm thick steel case that takes a 20 mm strap.

Its closest relative is the Diving Watch EZM 3 (603.01), the same 41 mm steel diameter at 13 mm thick, a diver Sinn made to resist shock, pressure and magnetic fields. The T2 EZM 15 (1015.01) keeps the 41 mm size in titanium at 13.3 mm. The Chronograph U1000 EZM 6 (1011.01), whose chronograph pushers can be worked under water, steps up to a 44 mm case 18 mm thick.