Sinn EZM 12 Medical Professionals


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• Verified Owner Reviews (3 reviews)
SKU: SI-419

Watch Brand: Sinn

Sinn North America


Emergency rescue watch with PulseRotor
• Watch diameter (mm): 44.0
• Watch height (mm): 14.0
• Lug width (mm): 22
• Weight - head only (grams): 122
• Water resistance: 200 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Tegimented hardened steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Inert gas: Filled
• Calibre: ETA 2836-2
• Copper sulphate: Capsule
• Antimagnetic: 80,000 A/m
• Movement: Automatic mechanical
• Strap or bracelet: Strap
• Manufacturer's limited warranty: 3 years
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $4,120.00
Availability:  In Stock - Ships Immediately


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Condition:  This Sinn watch is brand new and unworn

Authorized:  WatchBuys is Sinn's official importer and distributor
This watch ships free to US, Canada, Puerto Rico, Guam and APO/FPO/DPO locations from NC with select shipping methods

Sinn EZM 12 Medical Professionals
Sinn EZM 12 Medical Professionals

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Product Details


The Sinn EZM 12 is designed for medical professionals, particularly those involved in emergency medicine.

This watch takes it place among Sinn's EZM Mission Timer Watches (Einsatzzeitmesser) which are designed for the German Special Forces, including SWAT, Customs, FBI, helicopter police, GSG9 and other elite units.

If you've traveled in Germany you know about the autobahn, which in many parts of the country allows for unlimited speed.  Although this unlimited speed is an adrenaline rush, it can unfortunately lead to very serious accidents.

German Air Rescue Team
To create this watch, Sinn collaborated with the German Air Rescue Team, which maintains a presence throughout the country.  This elite team flies helicopters staffed with doctors and medics who are on 24 hour standby for car accidents.


The Design of This Watch

Every rescue mission in Germany to which emergency doctors are dispatched is a race to save lives and against time. For the 'golden hour' and 'platinum ten minutes' are decisive in determining the course of action taken.

This means that a patient should arrive at the hospital within an hour of an accident and that a critical patient should be treated and transported within the first ten minutes.

A count-up inner rotating bezel allows emergency doctors to constantly keep an eye on the specified time frames, while a countdown outer rotating bezel enables the exact times for administering medication to be monitored.

The seconds hand is designed in the shape of a rotor and features an integrated pulse scale which enables easy recording of the heart rate every 15 seconds. The EZM 12 is designed so that emergency personnel are equipped with a high-performing tool that will contribute to saving lives.

Another special feature of the EZM 12 is the easy to clean watch bezel and strap. The silicone strap can be removed without the use of tools, while the rotating bezel may also be removed using a large screwdriver for cleaning.

Finally, Sinn has integrated the copper sulphate capsule into the crown and has incorporated orange ceramic on the outside surface area of the crown.

Other Features of the Sinn EZM 12

  • Case made of fully Tegimented bead blasted stainless steel
  • Bezel with black PVD/DLC coating which is Tegimented
  • Ar-Dehumidifying Technology enhances reliability and prevents fogging
  • Magnetic field protection to 80,000 A/m
  • Count-up inner rotating bezel for quick reading of the 'platinum ten minutes' and 'golden hour'
  • Countdown outer rotating bezel
  • Pulse rotor with pulse rotor scale for measuring heart rate
  • Sapphire crystal glass
  • Functionally reliable from -45 to +80 degrees Celsius
  • Water resistant to 200 meters
  • Hours, minutes, seconds, date and day displays
  • Designed crown system which incorporates the copper sulphate capsule
  • Completely flat case back with no ridges to facilitate cleaning

Frequently purchased with this item:

Watch specifications are provided by the respective watch manufacturer and/or other sources. Although we use best efforts to provide accurate information, we reserve the right to make corrections when advised of specification changes and/or content errors.


WatchBuys is the official and authorized North American distributor and importer for Sinn watches.

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 and importer, 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 Sinn Authorized Service Center, RGM Watch Service located in Mount Joy, Pennsylvania. This added benefit saves our clients the time and effort of returning their watches to Germany for repair. This service 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 click here for instructions on returning your 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 UPS 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.




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.


Watch Reviews From Verified WatchBuys Buyers
100% • Verified Owner Reviews100% • Verified Owner Reviews (3 reviews)

Great Purchase!!

"Great Purchase!!"

Verified Owner Comments: Looks and functions beautify! Very comfortable on wrist Feels lighter than I thought.

Attractive and noticeable

"Attractive and noticeable"

Verified Owner Comments: I get compliments on this watch. The orange , gray and black stands out. Is not oversize for my 7.25 wrist. The strap was not easy to set up. I bought a Nato orange stripes and black and makes this watch pop. Is my motorcycle riding watch. Sinn anti-reflection is the best.

The sapphire crystal is clear to exhibit the beautiful dial. This is a keeper.

Useful Tool Watch For Medical Professionals

"Useful Tool Watch For Medical Professionals"

Verified Owner Comments: Although designed for primarily for field use, I found this watch useful for dealing with cardiac arrests in hospital. The pulse rotor, is pretty much unnecessary in hospital emergency situations where patients are usually on a cardiac monitor. The most useful features of the watch during an in hospital cardiac arrest are the two bezels. One enables you to time the total length of a resuscitation effort, while the other allows you to time the interval administraion drug doses.

The fit and finish of the watch are typically Sinn, namely excellent. I found sizing the strap required some time and effort. Overall, I would recommend this watch for medical professionals who deal on a regular basis with emergency situations both in the field (for which it was designed) and in the hospital (for which some of its features are useful).