The Sinn EZM 12 112.010 is an incredible watch, from Sinn's Einsatzzeitmesser (Mission Timer) collection and this watch is definitely designed with an important mission in mind. Sinn gathered as much feedback as they could to make this watch with doctors with the air rescue service in mind. The seconds hand has designed in the shape of a rotor which enable to reading of the heart rate every 15 seconds by using the pulse scale. 

The watch also features a count-up inner rotating bezel and a countdown outer rotating, allowing you (or the doctor) to monitor several timeframes at ones. 

Aside from those useful aspects, it also an excellent watch, featuring a mechanical (automatic) Swiss Made ETA 2836-2 movement. The watch also has a tegimented (External) bezel with Black Hard coating, tegimented case and tegimented clasp on the comfortable silicone strap. Speaking of the silicone strap - this uses a clever system so that it can be removed without the need of tools.

The external bezel can also be removed more easily with the large screwdriver from the included Sinn pocket knife. This has been especially done to ensure cleaning the watch fully is easier than on any other watch. 

Of course things like 200m water resistance, Ar-Dehumidifying Technology, Magnetic Field Protection up to 100mT and sapphire glass are standard. 

The Sinn EZM 12 is versatile, it's practical, it's breathtaking, it's quite simply one of the most unique watches out there.