Sinn U2 Black EZM 5 on Strap

Mechanical diver's watch with two time zones fully Tegimented
• Case diameter (mm): 44.0
• Case thickness (mm): 15.5
• Case lug width (mm): 22
• Weight - head only (grams): 114
• Case back: Solid
• Case metal: Tegimented hardened PVD submarine
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Inert gas: Filled
• Copper sulphate: Capsule
• Movement: Automatic mechanical
• Manufacturer's limited warranty: 3 years
• Warranty service: RGM or Sinn
° Earn 6460 WatchPoint Rewards on this purchase
WatchBuys Direct Price: $3,230.00
Availability:  Sold Out - Click Notify Me to Receive Notification of New Stock

Sinn U2 Black EZM 5 on Strap
Sinn U2 Black EZM 5 on Strap
Product Details

The Sinn U2 EZM 5 Schwarz (Black) has become one of our best selling watches and for good reason - it's tough, packed with technology and looks great on your wrist.

All Tegimented

This watch is far more than simply a black version of the standard Sinn U2. When Sinn first introduced the U Diver's Series several years ago, the most requested feature was an all Tegimented watch (the standard U models feature a Tegimented bezel).

The Sinn U2 Black is constructed from the same steel that is used on the outer hull of submarines. The steel was procured by Sinn from a steel supplier to Emden GmbH, one of Germanys North Sea shipbuilding yards who construct submarines from the very same steel. This special steel is also amagnetic which means that is does not have magnetic properties and cannot itself become magnetized. The watch movement itself is protected from magnetic fields up to 4,800 A/m.

Next, the Sinn U2 Black features a completely Tegimented case, bezel, crown and case back. Standard steel used by most watch companies has a hardness of between 200 and 240 HV (Hardness Vickers is a common scale used to measure material hardness). The Tegiment layer on this watch in combination with the PVD coating has a hardness in excess of 2,000 Vickers which is more than nine times harder than standard steel.

The Tegiment layer is not a coating consisting of a foreign material, instead the steel itself that has been hardened using a special engineering process that creates a hardened barrier. This process increases the submarine steel's resistance to corrosion, as well as provides extreme protection from scratches and other damage to the case.

Engineering and Technology

The technology and design elements used to create the Sinn U2 Black go far beyond standards used at most watch companies.

The Sinn U2 Black contains features you won't find in other watches:

  • Full Tegiment construction
  • Case constructed of submarine steel for superior resistance to corrosion and scratches
  • Double Viton seals
  • Two Sinn copper sulphate capsules to absorb moisture and humidity
  • Inert gasses have been inserted into the case to promote a dry and stable environment
  • Bezel is screwed to the case using an exclusive Sinn design
  • Built to the standards of the German special forces - EZM 5
  • Second time zone complication indicated by a red tipped hour hand
  • Double coated anti-reflective sapphire crystal hardened with Tegiment process
  • In house case construction from Sinn's affiliated company in Glashutte, Germany
  • Increased water resistance to 2,000 meters
  • 4.6 mm thick sapphire crystal

The uni-directional ratchet operated rotating bezel is also milled from this submarine steel. The indices are machined directly into the bezel without the use of bezel inserts, which can corrode or come loose at deep depths. The international testing lab of Germanischen Lloyd has tested the Sinn U2 Black, and determined that the watch can be certified as water resistant to 2,000 meters. This same firm tests submarines for their ability to withstand the effects of underwater use.

Bold New Look

This is a watch with "attitude". The new black case design and black bezel are all Sinn, and present an almost "stealth" appearance.

And this watch has to perform - it's part of the EZM family of watches.

Sinn is known for their professional special forces watches, called the Einsatzzeitmesser (EZM - in English "Mission Timer") series. Sinn has long been a supplier of watches to various divisions of the German special forces, including the GSG-9, border protection, customs, military and special police divisions. Designing watches for these units carries a number of requirements, including resistance to shocks, water, magnetism and temperature changes among others.

This watch ships with a U Series style Sinn silicone black rubber strap with your choice of compact or standard buckle.


When you purchase your new Sinn watch from WatchBuys, you'll not only get a finely engineered timepiece with excellent value for money, you'll also benefit from the WatchBuys Sinn Advantage.

WatchBuys Advantage #1

Because we are the official and authorized North American Sinn distributor, your name and watch serial number will be automatically registered in our database for a Sinn manufacturer's limited warranty which we pass through.

This means that should your watch require service during the Sinn manufacturer's limited warranty period, service will be provided by Sinn in Germany when you return your watch to them. This Sinn manufacturer's limited warranty is transferable to subsequent owners as allowed by Sinn.

You are responsible for paying the shipping charges to Sinn, and all repairs that Sinn approves under its warranty are at no charge. Sinn will also pay the return shipping charges to the address you specify.

The Sinn manufacturer's limited warranty period is as follows:
  • Watches in the EZM Series: 3 years
  • Watches marked AR containing inert gas: 3 years
  • Watches in the DIAPAL Series: 5 years
  • All other Sinn models: 2 years

WatchBuys Advantage #2

As an added benefit to those who purchase Sinn watches from WatchBuys, you may choose to have your warranty repairs serviced through our US service center, RGM Watch Service located in Mount Joy, Pennsylvania. This added service saves our clients the time and effort of returning their watches to Germany for repair. This benefit is transferable to subsequent owners who purchase directly from the original registered owner.

Please note that you are responsible for paying shipping and insurance charges for sending your watch to RGM. Once they reach your watch in the service queue they will determine which repairs are covered under Sinn's warranty.

It is important to note that oil-filled quartz Sinn watches must be repaired in Germany (EZM 2, Hydro and UX series). If your watch meets one of these conditions and requires service under warranty, please contact us and we'll provide instructions for shipping the watch to Sinn in Germany.

WatchBuys Advantage #3

Your watch will be repaired at no cost to you other than shipping charges to either Sinn or RGM during the warranty period. Sinn watches purchased through the "grey market" (non-authorized sources) may carry no warranty from Sinn. Sinn watches purchased through authorized overseas retailers are governed by the warranty policies of those dealers and/or Sinn, and typically must be sent to either the overseas dealer or Germany for repair.

WatchBuys Advantage #4

You'll be wearing your new Sinn watch soon after your order is placed since we stock Sinn watches and ship free using FedEx Air. Plus, since we are located in the United States, there are no "hidden charges" for shipments to US residents as is the case with most overseas dealers. Such charges can add up to 15% to the cost of your new watch, and include credit card surcharges, foreign exchange credit card bank fees, import duties and taxes, and custom's broker charges.

WatchBuys Advantage #5

WatchBuys offers a comprehensive return policy with no restocking fees to US residents. Overseas dealers, including those involved in the grey market, typically don't offer a return policy, and if they do, returning a watch under the policy is both complicated and expensive due to import/export and custom's requirements. Restocking fees are also common and may range up to 15%.

Learn more about our return policies.

WatchBuys Advantage #6

WatchBuys is pleased to accept payments through PayPal, debit and credit cards. We charge no surcharges to use credit or debit cards, and because we are based in the United States your US card is charged in US dollars with no conversion or exchange rate fees.

We also accept payments from PayPal and charge no surcharges.

Please note that to pay by credit card, debit card or PayPal your account and/or card must be issued by US or Canadian financial institution and billed to a confirmed US or Canadian address.

WatchBuys Advantage #7

When you purchase your new Sinn watch from WatchBuys, you'll earn WatchPoint Rewards which accumulate and may be redeemed against future purchases.

Watch Reviews

Serious piece of watch gear!

"Serious piece of watch gear!"


Comments about this watch: I was in the market for a divers watch, and was looking at this watch as a possible contender. After attending the recent Chicago Roadshow, I made up my mind and got this piece.  Everything about this watch speaks of toughness.  The rotating bezel turns with nice clicks and with no looseness. All surfaces are finished nicely with the black PVD/tegiment treatment. The silicone strap is comfortable, silky feeling and nicely embossed with the "Sinn" wordmark. The deployant buckle is also great. The watch I got came with the black PVD/tegiment buckle which is great. Compared to my Sinn 856 UTC buckle, the U2 buckle is a beast!  The metal is thicker and seems to be CNC machined instead of stamped like the 856 buckle. It also requires that you press the two release buttons..pressing one will not open the buckle...nice! The dial and bezel markings are nice and legible. The red 2nd timezone markings are clear and well done. The lume markings are also nice and bright in low light... - more details

Toughest Watch I Have Owned!

"Toughest Watch I Have Owned!"


Comments about this watch: I have had this watch for a couple of weeks now and have already rated it once. It's a stunning piece and very well made. I wear it everyday and am VERY happy with it.

I felt compelled to add another review because of a recent incident with the watch. I am always careful with my watches but a couple of days ago, while opening a door, I struck the watch crystal and bezel against a metal door knob. It was a hard impact and I was not happy with myself. When I inspected the watch, there wasn't a single mark on it. Truly an amazing piece and very tough.

Thanks again to Sinn for creating such an amazing time piece. And I will be back to WatchBuys!

Sinn U2 Black EZM 5! Tough Watch!

"Sinn U2 Black EZM 5! Tough Watch!"

Ramsey Z.

Comments about this watch: I just received my Sinn U2 Black EZM 5 and am VERY pleased with it.

Sinn quality and craftsmanship are first rate. The watch has a great appearance and is very comfortable to wear.

The people at WatchBuys are great and very helpful! I highly recommend this watch and WatchBuys.

German watchmaking at it's best

"German watchmaking at it's best"


Comments about this watch: Great timepiece for the money. Solid steel case able to withstand strong impacts.

Recently ran a marathon with it without any problems. Keeps time with great accuracy. Dial is nice with combination of red and white.

Highly recommended for those with an active lifestyle.

Serious Technology

"Serious Technology"


Comments about this watch: As a child, I grew up wearing Swiss Army watches. Now that I'm an adult I've gotten a man's version; the Sinn U2 S.

It has taken the Swiss Army watch idea but put serious technology into it, tegimented anti-magnetic U-boat steel toughness, Ar inert gas and copper sulphate moisture prevention to prolong time between servicing, 2000m depth rating, 44mm diameter and 15.5mm thick, this is one big tough tool watch that has yet to be topped.

It is very comfortable to wear and is extremely understated in its abilities.




Comments about this watch: Tremendous timepiece. My job in the military has me in and out of birds, in and out of MRAPs/Strykers, and generally living in dust. Given these conditions, this watch holds up remarkably well.

Additionally, it's attractive as well as low-profile. The second timezone function is well done, however it won't help you in Afghanistan (which is half an hour off from the rest of the world...though that's more Afghanistan's fault than Sinn's). To give you an idea of the toughness and functionality of this watch, it's replaced my Suunto in the field.

Good work by Watchbuys for shipping APO and otherwise providing outstanding service.

Tough, Tough, Tough....

"Tough, Tough, Tough...."


Comments about this watch: This watch is very well designed and German Engineering at it's best. One tough, yet refined looking watch...

The WatchBuys team have been nothing but a pleasure to deal with!

Tough as Nails and Looks Fantastic!

"Tough as Nails and Looks Fantastic!"

Jim M.

Comments about this watch: I have worn this watch nonstop since receiving it in Oct 2008. This watch wears comfortably all day and looks great with any attire. I have knocked this watch on door knobs, the metal frame of my recliner and against my truck door (multiple times) and it shows no wear at all. Not a scratch!!

I have saved my nicer watches (Ulysse Nardin and Jaeger LeCoultre) for suits. This Sinn is an excellent buy. Thanks to the guys at Sinn for making such a tough watch that looks great as well.

U2 S EZM 5 Lives Up to the Hype!

"U2 S EZM 5 Lives Up to the Hype!"

Rob L.

Comments about this watch:

I just received my U2 S EZM and I am blown away by the attention to detail that Sinn put into this watch. The technology is top notch and the execution of it lets you know that Sinn is a serious watch company.
The guys at WatchBuys are top notch as well.

>> Read all watch reviews [] |  Write your own watch review


Rate this watch:        

Sinn watches feature a number of cutting edge technologies, many of which are unique to Sinn. Please note that not all Sinn watches, including the watch on this page, use all of these Sinn technologies.

Among the more notable Sinn technologies are:

Tegimented Hardened Cases

Many Sinn watches are fitted with Tegimented cases produced in-house by Sinn's case making affiliated company in Glashutte, Germany.

Standard steel used by most watch companies has a hardness of between 200 and 240 HV (Hardness Vickers is a common scale used to measure material hardness). The Tegiment process produces a hardness of at least 1,200 Vickers which is five times harder than standard steel (and on some Sinn models up to nine times harder than standard steel).

The Tegiment process is not a coating consisting of a foreign material; instead the steel itself that has been hardened using a special engineering process that creates a hardened barrier. The base material is a type of stainless steel also used for surgical implants, and the stainless steel resistance to corrosion is further improved by the Tegiment hardening process.

The primary advantages to a Tegimented case are extreme resistance to scratches and other case abrasions, as well as increased resistance to corrosion.

Please note that certain Sinn watches are fully Tegimented (case, bezel) while others are Tegimented only on the bezel. Use the links below to view both categories.

  • View Sinn watches with fully Tegimented cases.

  • View Sinn watches with Tegimented bezels only.

Dehumidification Technology

A number of Sinn models feature cases filled with inert gas. Sinn has found that filling the case with inert gas can help prevent the introduction of moisture and humidity to the case, as well as provide a more stable environment for the oils that lubricate the movement.

The proper care of any mechanical watch movement mandates that these oils maintain both their viscosity and lubrication properties.

  • View Sinn watches with dehumidification technology.

Copper Sulphate Capsules

A number Sinn models use one or more copper sulphate capsules to absorb humidity trapped inside the case. Over time these capsules will gradually turn dark blue indicating that humidity has been absorbed.

The primary benefit to these copper sulphate capsules is a more dry and stable environment for both the movement and the lubricating oils. Together with Sinn's inert gas treatment these capsules form the basis of Sinn's Dry Hold Technology.

This technology not only provides a more stable environment for the movement, but also prevents fogging of the crystal when going from hot to cold environments or from humid to non-humid conditions (such air conditioned buildings).

  • View Sinn watches with copper sulphate capsules.

Extreme Antimagnetic Protection

Magnetism can cause dramatic swings in the timekeeping of a mechanical watch movement. People are often exposed to magnetic fields without even being aware - frequent high altitude flying, metal detectors, audio and video equipment, medical equipment and computer equipment can all cause problems with magnetism.

Many Sinn watches offer extreme protection against magnetism up to 80,000 A/m. Sinn achieves these results using a number of different technologies, including special case and case back construction, soft iron components in the case and protective rings surrounding the movement.

  • View Sinn watches with extreme antimagnetic protection.

DIAPAL Oil Free Escapement

Sinn caused quite a stir when they first released their DIAPAL technology. Beginning in 1995, Sinn began work to create an oil free escapement. With any mechanical watch movement, the aging of oil, especially in the escapement can create long term problems for that movement. Additionally, as movement oil ages, required service intervals become more frequent.

Sinn's early analysis to this problem provided a quick solution (at least in theory) - if you don't use oil, it can't age. The process began by exchanging the ruby escapements for diamonds (the word "DIAPAL" derives from the German name for diamond escapements) in order to achieve the desired effect. The designation stuck, even though today Sinn works with solutions taken from advanced nanotechnology rather than diamonds.

The result is a movement that proves so reliable that Sinn offers an unprecedented five year warranty on their DIAPAL watches.

  • View Sinn watches featuring the DIAPAL oil free escapement.

Hydro Oil Filled Technology

Sinn has developed a technology termed "Hydro" in which the entire watch case is filled with oil. Watches using this technology are based on quartz rather than mechanical movements.

By using this type of movement, Sinn is able to fill the watch with oil, which has the joint affect of greatly enhancing the readability of the dial and time from any angle (including under water), and increasing the water resistance of the watch even at great depths.

  • View Sinn watches with Hydro Oil Filled technology.

Submarine Steel

Sinn has created a line of watches featuring cases made from German submarine steel (the U Series). The steel was procured by Sinn from a steel supplier to Emden GmbH, one of Germany's North Sea shipbuilding yards who construct submarines from the very same steel.

Because of the special steel used from the submarine steelmanufacturer, the case resists the effects of exposure to salt waterand salt water environments.

These cases are produced in-house by Sinn's case making affiliated company in Glashutte, Germany.

This special steel is also amagnetic which means that is does not have magnetic properties and cannot itself become magnetized. The watch movement itself is protected from magnetic fields up to 4,800 A/m.

  • View Sinn watches built from German submarine steel.

EZM Mission Timers

Sinn is a partner for manufacturing watches for the German Special Forces, including SWAT, Customs, FBI, helicopter police, GSG9 and other units.

Beginning with the now highly collectible (and valuable) Sinn EZM 1, Sinn has grown this collection to some of the most durable and highly functional watches made and they remain among the most popular in the collection.

  • View Sinn watches in the EZM Series.

TESTAF Certified Pilot's Watches

Lothar Schmidt, Sinn's CEO and owner had long been disturbed by a lack of technical standards for defining a "pilot's watch". As an engineer, Mr. Schmidt was fluent in standards for diver's watches, anti-magnetic watches and the many other technological standards used to manufacture watches.

A widely used reference for standards is DIN, or the Deutsches Institut fr Normung (German Institute for Standardization). Oddly, he discovered there were no DIN standards to cover pilot's watches where such standards existed for example for diver's watches.

The new "Technical Standard for Pilot's Watches" (TESTAF) was developed by the Aachen University of Applied Sciences and establishes the suitability for professional use as a pilot's watch.

  • View Sinn watches in the TESTAF Series


Other Considerations
Sinn U2 Black EZM 5 on Strap is currently not available, but we thought you might be interested in these related items: