Sinn EZM 3 Divers on Strap

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• Verified Watch Owner Reviews (24 reviews)
SKU: SI-052

Watch Brand: Sinn

Sinn North America

Automatic winding mechanical watch in steel on strap
• Watch diameter (mm): 41.0
• Watch height (mm): 12.3
• Lug width (mm): 20
• Lug to lug (mm): 47.5
• Weight - head only (grams): 81
• Water resistance: 500 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Stainless steel
• Dial color: Black
• Front crystal: Sapphire
• Inert gas: Filled
• Calibre: SW200-1
• 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: $2,170.00
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 3 Divers on Strap
Sinn EZM 3 Divers on Strap

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Product Details

The Sinn EZM 3 on strap is the last of the original Sinn EZM series of watches, designed for extreme conditions (the Sinn EZM 1, EZM 2 and EZM 4 models have all been retired). The inert gas filled watch cavity and dehumidifier capsule prevent fogging by guarding against moisture intrusion, and special micro-lubricating techniques allows for operation down to -45 degrees Centigrade.

The case has an iron core to protect against extreme magnetic fields. Sand-blasted stainless steel case with rotating elapsed time bezel. Reversed screw down crown and matte black dial with luminous hands and markings.

This is the perfect mechanical watch for extreme conditions, whether they be water depth (water resistant to 50 atm), temperature or magnetic fields.

This watch is fitted with a black Sinn calf leather strap with white contrast stitching.
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 Watch Owner Reviews100% • Verified Watch Owner Reviews (24 reviews)


"EZM 3"

Verified Watch Owner Comments: Nice watch with a great feature set. I purchased the black leather strap version, the pictures don't do it justice.

Watchbuys service was great, like usual - they swapped the strap for a different size prior to shipping.

The ultimate tool watch

"The ultimate tool watch"

Verified Watch Owner Comments: I used to be much more of a watch collector back in the early 2000s and had a couple of Sinns back then, a 144 which I got new, maybe even at WB, and a 156 I bought on one of the forums. I've always regretted moving them on from my collection. This is my first watch purchase in over a decade, and I couldn't be more pleased with it. I love that it has its own aesthetic, and doesn't try to ape a Sub or Seamaster. It looks and feels tough as nails without being brutish. It's eminently legible, and every element of its design is functional. Its size is perfectly wearable, too, for someone like me with a 16.5 cm wrist. The compact lug-to-lug distance is another element of its thoughtful design. To me this is the ultimate tool watch, and I already have it on a Nato, as I plan on using it daily, including during strenuous activity. No need to sweat into the nice leather strap it comes with. This is one Sinn that is a keeper for sure. WB's service is excellent: the watch arrived in just ... - more details

Great Tool Watch

"Great Tool Watch"

Verified Watch Owner Comments: I have had this about a week and a few things stand out.

1) It is very comfortable. I was surprised at how well this watch sits on my wrist.
2) Very accurate. This watch is about 3 seconds fast a day.
3) Great craftsmanship. I have a feeling I will have this watch a long time.
4) Works well with just about any outfit. From gym shorts to a suit I think this watch would not be out of place.
5) Unique, this isn't your standard dive watch and that stands out.
6) The bezel is easy to turn and easy to grasp. Overall this watch looks like it could go through anything and still has that understated appeal that sets this as a tool watch and not jewelry.

Wish I bout this years ago.

Compact Monster

"Compact Monster"

Verified Watch Owner Comments: Understated, discreet and humble. The EZM3 shows up for work right off the bat. This is a serious compact monster of a watch. German engineering almost at pure perfection. Workhorse with style. The bezel is a non-nonsense 60 click bezel made to remove debris if bezel play despite what you might read on the internet. Getting used to the size at 41mm (Full disclosure is that I normally wear 42mm-44mm). Does not look small on my wrist I have a 7.25inch wrist. Immediately love having the crown on the left side of the watch. The EZM is wearable and comfortable. Movement is crisp, fluid and accurate...expecting nothing less from Germany. The dial is clean but holds the only flaw. The red date is impossible to read. I like having a date on my watches and this gives argument to the no date function for dive watches. Am disappointed with the lack of readability for the date window - looks great in pictures but fails miserably in execution. If you like the date, give thought to ... - more details

Best dmn watch I own...

"Best dmn watch I own..."

Verified Watch Owner Comments: My Sinn EZM 3 is the best-built, and most rugged, tough, durable, precise and accurate watch I own, HANDS DOWN.

Mine is 14 years old and still does not have a mark on the case, anywhere. Also my most accurate watch, running typically at +0.75 sec/day. Excellent legibility, a hallmark for clean, legible, functional design.

Best dmn watch I own.

Great watch for a lefty

"Great watch for a lefty"

Verified Watch Owner Comments: Although designed with the crown on the 9 o'clock side of the watch to keep the crown from interfering with a righty's hand movement, I find that the crown is well placed, such that it does not interfere with this lefty's hand movement either. 

A plus is that I do not have to take the watch off my right wrist to hack the time (which I don't have to do very often with this watch, since it keeps great time), unlike with most other watches with the crown on the 3 o'clock side. 

Another quality watch from Sinn.



Verified Watch Owner Comments: Just got this as a workwatch, figured it would be good skiing, boating, etc. 

This is a very serious watch, double the features of a Omega or Rolex and 1/3 the price. The leather strap has a casual sporty feel. 

Very happy with the purchase. 

Also my wrist is under 7 inches so this 40 mm feels just big enough. I see this becoming my favorite watch in no time.


"EZM 3"

Verified Watch Owner Comments: I have wanted an EZM 3 for quite some time, and I finally decided to pull the trigger two weeks ago.

I could not be happier; the quality of the watch is incredible - extremely well made, amazing attention to detail, and it's +/- 0s over two weeks.

The WatchBuys customer service is equally as good - you will not be disappointed. I do not see this coming off my wrist any time soon.

Solid purchase

"Solid purchase"

Verified Watch Owner Comments: Some say the outside anti-glare coating may scratch, but if so that is a minor concern in my opinion as it is coated both sides to the best of my knowledge.

Mesmerizing to watch this one tick.



Verified Watch Owner Comments: by far the best I own.


EZM3- Accuracy Great

"EZM3- Accuracy Great"

Verified Watch Owner Comments: Have now had this watch for about 8 weeks and it keeps getting more accurate.

Very happy with this purchase and keep getting compliments on it....well done.

Why did I wait so long?

"Why did I wait so long?"

Verified Watch Owner Comments: Rolex quality at 1/5 the price.

Prettier than my Rolex sub. I should have bought one years ago. I'll keep my Rolex, but why did I spend so much money on it?


"EZM 3"

Verified Watch Owner Comments: Absolutley love my new EZM 3. As an engineer, I really appreciate all of the Sinn Technology inside of this watch and really look forward to enjoying it for years to come.

Watch came on time and appreciated the contact from WatchBuys to make sure everything with my order was ok.

Highly recommend this site.

New EZM3

"New EZM3"

Verified Watch Owner Comments: Great service.

The EZM3 has the same quality as any of my Rolex at 1/5 the price.



Verified Watch Owner Comments: Perfect "use any time, go anywhere" watch.

Purposeful built, yet dress watch size and handsome looks. The reason the date wheel was done in red is to separate those numbers from the white numbers going around the dial. Would have looked pretty cluttered there around 4 o'clock. Actually makes sense, and the date is still there for you.


"EZM 3"

Verified Watch Owner Comments: A watch made for the German Border Forces was a fitting choice for my own profession here in America. My proclivity for this watch over other divers was its reasonable size of 40 mm. The EZM 3 is appropriate for any setting from formal business meetings to guarding the border.

As others have stated, the only feature for which this watch can be criticized is its date wheel. The selected color is difficult to read when ambient light is moderate to low luminosity. Sinn designed this watch for nonessential information to disappear during operations. Unfortunately, this feature works all too well.

Nevertheless, the EZM 3 is still a great choice and a worthy addition to any collection.

All you need in a watch

"All you need in a watch"

Verified Watch Owner Comments: Super nice "tool" watch.. I have owned many Sinn watches. This is one of my favs..

Great all around, good looks, easy to read dial. Not overstated a pleasure to wear everyday. This one is a keeper..

Great All 'Rounder

"Great All 'Rounder"

Verified Watch Owner Comments: Absolutely love this watch. I evidently just bought their last one and added the bracelet. Has the typical Sinn quality with a different look than the U series.

Classy and dressy enough to be worn anywhere, but robust enough to be a working diver. I told Matt this has instantly become my favorite watch. I've had more compliments and comments in a couple days than with any other watch I've owned. It wears "big" so looks a little larger on the wrist than its 40mm size would suggest.

Only funky detail is the red date is too hard to read for my tired eyes, but I don't care much about date anyway on my watch.

A Very Cool Retro-look Diver!

"A Very Cool Retro-look Diver!"

Verified Watch Owner Comments: A perfect size diver for those who don't care for the current trend of oversized wrist watches.

As tough, as a watch can be, and I can wear it in any situation.The sandblasted case adds to its sporty, yet serious, appeal The small amount of red script, makes the dial pop. A whole lot of "funky/cool" tool watch goodness here.

I love it!

No need to pay more

"No need to pay more"

Verified Watch Owner Comments: Awesome, last of the great EZM tool watches.

Get one while you can. Love mine.

My tried and trusted EZM3

"My tried and trusted EZM3"

Verified Watch Owner Comments: So how many fine sport watches can you find with a lefty crown? Not too many. Maybe an Oris TT, but it doesn't hold a candle to the Sinn EZM3.

Has been one of the most durable, time reliable and comfortable sport watches I've owned. Tough to find but German engineering to a "T." Pretty cool to trump so many more common place and WatchBuys has been a delight with service. Okay...only bad is that the date dial is in red and a little tough to read at a glance. Other than that the watch has been perfect!

Get one before they're history like rest of EZMs!

Beautiful and perfect size

"Beautiful and perfect size"

Verified Watch Owner Comments: At a time when so many dive watches are behemoths, this one is perfectly sized for business or casual dress.

The dial is a classic. And despite what some say, the bezel action is not too loose and pleasing to me.



Verified Watch Owner Comments: I have owned this watch for a few years now, I love it, a beautiful watch.

Next best thing to an EZM1

"Next best thing to an EZM1"

Verified Watch Owner Comments: If you liked the EZM1 then you need to get the EZM3.