The mechanical wristwatch – a concept with a future or a relic of the past? Looking at the immense digital progress of recent decades, you could make a good case that the classic timepiece is obsolete. Fortunately, the Frankfurt watchmaker Sinn proves otherwise with its mission timers: built for the harshest conditions, they serve special forces and adventurers every day as indispensable companions. Let's take a closer look at the range of these innovative models.
In Focus: Robustness and Reliability
The Sinn EZM was born more than 20 years ago: developed for the special units of the German Federal Police and German Customs, the EZM 1, unveiled in 1997, featured an uncompromisingly minimalist design. This purpose-driven approach not only gave the chronograph outstanding legibility in every extreme situation but also laid the foundation for a whole series of further specialist watches.
Today's lineup of Frankfurt mission timers offers dedicated timepieces tailored to the requirements not only of divers and pilots, but also of firefighters, rescue workers, and elite units such as GSG 9. Defined by their exceptional toughness and functionality, the Sinn EZM editions rank among the most technically advanced instruments in the watch industry.
Submarine Steel and Dehumidifying Technology: Dive Watches in a League of Their Own
There is one place where this innovative strength is needed more than anywhere else: underwater. It's hardly surprising, then, that divers are a major focus for the specialist watchmaker. The EZM 13 stands out in particular, with a chronograph minute counter graduated to 60 instead of the usual 30.
Thanks to this feature, a single glance is enough to read every minute within an hour. The fact that the crown and pushers sit on the left side of the case may seem odd at first, but there's a practical reason behind it: it's the only way to prevent these components from digging uncomfortably into the back of your hand.
The clever solutions continue inside the watch: while Sinn's in-house Ar-Dehumidifying Technology, used in numerous other Sinn watches as well, preserves the quality of the oils and thus increases reliability, the 500 meters of water resistance is well above average. If that's not enough for you, the Sinn dive watch EZM 5 offers an even more radical solution.
Here, the decision was made to manufacture the entire case from submarine steel and, almost in passing, achieve water resistance to 2,000 meters. If these monstrous figures seem hard to believe, a call to DNV GL is all it takes: since 2005, the independent classification society has certified that the Frankfurt specialist watches meet European diving equipment standards.
When Scratches Become a Minor Concern
Another development from the Sinn EZM bag of tricks is the so-called TEGIMENT Technology. This term refers to a special surface-hardening process that gives the watches remarkable scratch resistance. Not only the EZM 5 but also the EZM 15 makes use of this practical technology.
The latter, also marketed as the T2, likewise dives to 2,000 meters and, thanks to its matte titanium case, has an almost shy presence. However understated – some might even say tame – the watch may appear, its captive safety bezel ensures that no elapsed times are lost, even under the most extreme force.
Weaknesses: Not Allowed
Yet the mission timers seem indestructible not only in the water but also on land and in the air. The EZM 7S, created for everyday firefighting duty, offers perhaps the most impressive example. Its rotating bezel is color-coded so that respirator wearers can quickly set and read the most critical operational times.
Limited to 300 pieces, this instrument-style Sinn watch features not only a second time zone but also the Hessian heritage brand's almost famous magnetic field protection – up to 80,000 A/m can act on the watch without risk. Probably even more important in firefighting is the wide temperature range of -45 to +80° C, within which the specialist watches remain fully functional.
Any discussion of the EZM has to include Sinn pilot watches. The EZM 10 TESTAF, whose suitability for aviation use was certified by FH Aachen University of Applied Sciences, introduces another of the manufacturer's achievements: DIAPAL Technology. This is a lubricant-free lever escapement that uses material pairings with exceptionally low friction instead of oils. Given this and the many other engineering solutions from the manufacture, it seems almost a matter of course that the pilot's watch is optimized for maximum functionality, from the dial to the ergonomics.
Pioneering Spirit and a Passion for Flying
From the scratch-resistant TEGIMENT surface to the extreme depths of the divers to the firefighter's watch: the specialist watches from Frankfurt boast a seemingly endless variety of intelligent technologies. It's an innovative strength that outshines even many Swiss manufactures.
Yet it all started on a modest scale: founded in 1961 by pilot and flight instructor Helmut Sinn, the company initially specialized in pilot watches and gradually expanded its product range.
What sets the brand apart from the mass of watchmakers is not only its direct sales model, which cuts costs and allows its watches to be sold at comparatively affordable prices, but also its consistent prioritization of practical over aesthetic considerations. Perhaps it is precisely this latter aspect that made the company's technical achievements possible in the first place. Either way, we can look forward to seeing what further ideas the Sinn EZM will bring to the horology of the future.
