http://www.deskdivers.com/Site/EZM.html

In the late 1990’s Sinn released a new line of watches with the EZM moniker. EZM stands for Einsatz Zeit Messer, which translates to English as Mission Timer. These watches were designed to be issued as tool watches to the German special police forces and each watch (EZM1 through EZM4) had different functionality to suit its intended special force’s needs. The range consisted of the custom special combatant (EZM1), the border guard diver unit (EZM2), the police special force (EZM3), and the fire fighting rescue unit (EZM4).  Sinn used different movements (Quartz, Automatic) and different watch styles (Diver, Chronograph) to create this range of tough, non-nonsense watches - in this article we will focus on the EZM2.

Sinn watches have long been known for their high quality functional watches and reasonable prices. The EZM2 personifies this perfectly. For this timepiece, Sinn decided to build a watch based on their existing 403 model which utilised a quartz movement (ETA 955.612) with 7 year battery life. Needless to say, this helped keep the price affordable, but don’t confuse this as some kind of cheap battery powered watch. The EZM2 is shock resistant and anti-magnetic and the case is filled with pure silicone oil thereby providing optimum visibility at any angle, especially when submerged. The oil also enables the watch to withstand depth pressures that would crush ordinary watches. Sinn calculate that the watch could withstand depths of 11,000 ft / 5000m, but instead they, and this is typically Sinn, mark the caseback simply with an understated ‘Waterproof’. Make no mistake - this is a tool diver’s watch!

...