Sinn UX EZM 2 B GSG9 on Bracelet


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• Verified Owner Reviews (8 reviews)
SKU: SI-178

Watch Brand: Sinn

Sinn North America


Diver's watch with quartz movement and oil filled case
• Watch diameter (mm): 44.0
• Watch height (mm): 13.3
• Lug width (mm): 22
• Lug to lug (mm): 50.5
• Weight - head only (grams): 105
• Water resistance: 5,000 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Submarine steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Bezel only
• Calibre: ETA 955.652
• Movement: Quartz oil filled
• Manufacturer's limited warranty: 3 years
• Strap or bracelet: Bracelet
• Warranty service: Sinn Germany

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WatchBuys Direct Price: $2,750.00
Availability: Temporarily Sold Out





Sinn UX EZM 2 B GSG9 on Bracelet
Sinn UX EZM 2 B GSG9 on Bracelet

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Product Details

This is a special release of the Sinn UX, and is designed for the elite German Grenzschutzgruppe (GSG9) special forces unit in underwater tactical operations. Notice the dial design and the crown placement on the left side of the watch.

The Sinn UX pushes watch technology to the limits. Like the Sinn U1 and U2 watches, the Sinn UX GSG9 features a case made from the same submarine steel that is being used to build the latest generation of German military submarines.

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. 

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.



Unlike the Sinn U1 and Sinn U2, the Sinn UX GSG9 features a quartz movement rather than a mechanical movement.

By using this type of movement, Sinn is able to fill the watch with oil, which has the double 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.



The Sinn UX GSG9 is covered with a thick sapphire crystal for extreme protection. This sapphire crystal features a special anti-reflective coating that is scratch resistant - the coating itself has been hardened to 1,800 HV.

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 bezel features Sinn's Tegiment technology.

This watch is designed for operation in extreme temperature variations - it operates in temperatures between -20° Celsius to +60° Celsius. 

The movement is water resistant to 5,000 meters, and the case is pressure tested to a diving depth of 12,000 meters as certified by Germanischer Lloyd in Hamburg.

Matte black dial with date at 3, Super Luminova on hands and markers, and white seconds hand complete the design.

This watch is fitted with a Sinn stainless steel H-Link bracelet with locking clasp (not quick adjust).

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.


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.




Service Notes for This Watch

This watch is powered by a quartz movement and the case is filled with oil.

Special proprietary machines and equipment are required to change the extended life battery and to refill the case with oil.

Because only Sinn in Frankfurt has the necessary machines and equipment to correctly service this watch, you will need to return the watch to Frankfurt approximately every seven years for service.


Watch Reviews From Verified WatchBuys Buyers
100% • Verified Owner Reviews100% • Verified Owner Reviews (8 reviews)

Excellent watch

"Excellent watch"

Verified Owner Comments: From the bead blasted bracelet, to the black dial, and all the details in , this is a great watch. Although I know I'll never need the depth rating, it's a great watch that I'm sure my kids and grandkids will enjoy after I'm long gone.

First watch and not the last

"First watch and not the last"

Verified Owner Comments: Got my first watch from Watchbuys and I couldn't be happier, my Sinn is stunning and the service from Watchbuys is been great, communication is been great from the pre-order process and following up after I received well packaged, best experience buying online.

Thank you very much.

Very cool

"Very cool"

Verified Owner Comments: Awesome. Good looking, solid tank of a watch. Fits my 7 1/8 wrist perfectly. Highly recommend.

Completely Happy

"Completely Happy"

Verified Owner Comments: Wonderful experience from start to finish.

Thanks to Rob and everyone else at Watchbuys for a seamless transition. I was in contact with a representative every step of the way. To include a follow up call a day after the watch arrived to ensure it was delivered on time and answer any questions I had.

The watch is beautiful. Amazing clarity due to the oil filled case. Can definitely tell this thing is constructed like a tank although the 44mm case width does not sit large on my wrist. I definitely recommend the watch and Watchbuys

Sinn UX EZM 2 B GSG9

"Sinn UX EZM 2 B GSG9"

Verified Owner Comments: I love this watch. I have now owned 2 of them. The first I sold in a weak moment, but missed it so badly I had to buy another.

I have had Rolex, Omega, Fortis, several other Sinn's, whatever but this is the best I have ever owned.

UX EZM2B GSG9 is a Battleship!

"UX EZM2B GSG9 is a Battleship!"

Verified Owner Comments: At 44mm, I thought this watch might be too large for my average size wrist. (40mm seems to be a sweet spot for me.) Sinn designed this case to fit comfortably, yet it doesn't look oversized. This U-Boat Steel watch is a Battleship! It's my indestructible, absolutely glare free, every day watch.

You won't be disappointed!

Awesome Watch!

"Awesome Watch!"

Verified Owner Comments: I bought this watch after attending a Road Show in Austin. The UX was not even on my radar but after seeing it in person, I had to add it to my collection. If you want something cool and unique, the UX is for you.

I was concerned that 44mm might be gaudy or too big but it is just right. The watch is beyond solid and feels like it was crafted from a single billet of steel. I sprung for a tegimented bracelet and am very happy with it. There is a disclaimer on the web site about the color of the tegimented bracelet not exactly matching the watch case but the difference is negligible. In fact, the bezel is tegimented and the bracelet matches perfectly. This is my daily wearer and I could not be happier.

Thanks to "Road Show" Rob and everyone at Watchbuys for hooking me up. I could not be happier!

Amazing Watch

"Amazing Watch"

Verified Owner Comments: I bought this watch awhile back when WatchBuys was just about to run out of stock. I chose the model with the German special forces logo on it rather than the other version. I'm glad I did. If there's anyone thinking the label may be a bit cheezy, DON'T. The dial is large enough to actually make it look like it belongs on the watch. The red and black dial are perfect together. It keeps amazing time and has a very long battery life. The only thing I didn't care for is knowing I have to ship the watch to Germany for a battery replacement. But since the battery lasts 7 years or longer, it's not too big of a deal. On top of that, it's quartz so you don't have to worry about any "overhauls" every few years as you do with automatics. Having said that, my next Sinn will still be the EZM 3. But as for this Hydro model, trust me when I say you will definitely not be disappointed with this watch. It's built like a tank and is my favorite watch; I like it even better than my Omega PO and "regular... - more details