Sinn U1 SDR Black Bezel on Silicone Strap

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• Verified Watch Owner Reviews (10 reviews)
SKU: SI-216

Watch Brand: Sinn

Sinn North America

Automatic winding mechanical diver's watch with black bezel
• Watch diameter (mm): 44.0
• Watch height (mm): 14.7
• Lug width (mm): 22
• Lug to lug (mm): 50.5
• Weight - head only (grams): 113
• Water resistance: 1,000 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Submarine steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Bezel only
• Calibre: SW200-1
• Movement: Automatic mechanical
• Strap or bracelet: Strap
• Manufacturer's limited warranty: 2 years
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $2,740.00
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 U1 SDR Black Bezel on Strap
Sinn U1 SDR Black Bezel on Silicone Strap

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Product Details

We think this watch has attitude. Sinn took all that's great about the best selling Sinn U1 and added DLC black bezel. This bezel has been fully Tegimented to 1,500 Vickers, or more than 7 times the hardness of standard stainless steel.
Sinn Bezel
The black bezel creates a perfect contrast with the submarine steel case, and with the white and red markings is highly legible.

The U1 SDR case is made from the same steel that is also used in the construction of the outer hull of 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.

The uni-directional ratchet operated rotating bezel is also milled from this submarine steel and is Tegimented. 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 U1, and determined that the watch can be certified as water resistant to 1,000 meters. This same firm tests submarines for their ability to withstand the effects of underwater use.

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

Other features include sapphire crystal with anti-reflective coating, and a silicone strap with a quick adjust deployant buckle.

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 (10 reviews)

Great watch

"Great watch"

Verified Watch Owner Comments: Great watch, it is massive but wears smaller and not that heavy without metal bracelet. Runs +5 sec/day, very steady and within COSC specs (while not being COSC).

Support from watchbuys was great, all my questions were answered before purchase, shipping was fast. Just awesome experience.



Verified Watch Owner Comments: Hello WatchBuys, this is the first time purchase with you, I found the service and product to be top notch, will do this again shortly and recommend others, thank you.

Great Watch

"Great Watch"

Verified Watch Owner Comments: This is my second Sinn, the first being an Arktis which I've had for many years. Love the design of the U1-great wrist presence, solidly built, looks fantastic on the rubber strap. Its a winner all the way around. There's no mistaking the looks of the watch for anything other than the Sinn U1.

First time buying a Sinn

"First time buying a Sinn"

Verified Watch Owner Comments: Having owned a few Seiko's and a number of Casio's over the years I felt the need to pull the trigger on something European. I looked at many brands from the Swatch group, Rolex, Omega, TAG, etc. What I found is that prices for those luxury pieces were way out of my league, and that most of those supposedly tool watches were not that robust, or at least didn't seem to be branded that way. This is why after much research I opted for Sinn. The brand is so focused on giving you an actual robust, uncompromising, aesthetically functional tool watch, that I had to have one. In this case I bought the Sinn U1 SDR, and I couldn't be happier with my purchase! The watch runs at a very consistent +6 seconds a day, and I'm sure with a minor regulation it can run within +/- 1 second per day. It really is that consistent, despite barely leaving my wrist since I got it! Speaking of wrist's, mine is 7 and a quarter inches, and I don't find the 44mm to be too big at all. In fact, if you are used to ... - more details

Tough and easy to read

"Tough and easy to read"

Verified Watch Owner Comments: If you are looking for a serious diver this is it. First, it has without a doubt the most visible watch face of any diver I own. Full disclosure: I own a Rolex Sub no date and an Omega basic no date also. More on the comparison the U1 and those watches in a moment. I like the size and heft of the U1, Sinn, as usual, does not stint on steel and mission oriented features. I like the easy to read look of the bezel, but it does move up and down a bit when you push on it and that seems odd to me and a bit irritating. This movement seems to be some sort of spring loaded retention device and, while irritating, does not impede function in any way. Did I mention that this diver has easily the best visibility of the face in my group of divers? The crystal is flat and there is no discernible glare at nearly every angle. The mat black background, thick white hands and orange highlights make reading the time or elapsed time easy. I like this watch very much. OK, some negatives. First, I bough... - more details

Sinn U1 SDR

"Sinn U1 SDR"

Verified Watch Owner Comments: This watch is an outstanding value. I have owned a number of watches from Rolex, Breitling, Omega but the Sinn U1 DSR is in class by itself.

From the design and function to the craftsmanship of the Sinn U1 there is no better bargain out there.

Backed by the excellent customer service of Watchbuys, you cannot go wrong!!

Sinn U1 SDR

"Sinn U1 SDR"

Verified Watch Owner Comments: This watch has been outstanding.

To me there is no better design and functional usage than the U1.  The black dial only improves on the standard design and the service at

WatcBuys is second to none. Well done guys.....

Very High Quality

"Very High Quality"

Verified Watch Owner Comments: I have owned the Rolex Sea Dweller, Breitling Seawolf Avenger in Titanium, Tag Huer, etc... All of which are good watches BUT none of them, in my opinion, can compare to the Sinn automatic dive watches. I am a Scuba Diver, Skydiver, Law Enforcement Officer, etc... I wanted a watch that does not need to leave my wrist for any reason no matter what activity I am engaged in. This even includes Church for that matter. If you were to do extensive research like I have done, then the only logical OBJECTIVE choice would be one of the Sinn diver watches. I prefer the U1 so that is what arrived today. Pictures can not begin to do it justice and I am truly amazed by the price. To be FRANK...Sinn needs to raise their prices. A Rolex Submariner has nothing on this watch BUT people are ignorant and believe strictly in a name. Also...people base quality on price which is also VERY ignorant. With that said a pre-owned Rolex Sub base model will set you back approx. $4000.00 plus. from an unauthorized r... - more details

The Beast Deal on the Planet!!

"The Beast Deal on the Planet!!"

Verified Watch Owner Comments: I am some what of a watch collector other watches include: Rolex, Omega & Tudor. Not too long ago I started looking for another watch to add to my collection, however this time I wanted a watch I could wear all day under any type of circumstances, whether it be fishing, boating, flying or simply going to the supermarket. Behold the Sinn U1 (Black Bezel), what a find what a bargain, I seriously doubt there is a better watch out there for the money, the quality, craftsmanship and design of this watch makes it look like a much more expensive time piece. The new Black Bezel brings out the red and white our hands and second hands making it stand out that much more, despite its tough appearance its surprisingly comfortable to wear all day long with out even noticing its there. This watch is a must have for any amateur or serious watch collector out there; it clearly exemplifies the quality of German craftsmanship making this watch in my humble opinion THE BEAST DEAL ON THE PLANET!! The s... - more details

Sinn U1 SDR

"Sinn U1 SDR"

Verified Watch Owner Comments: It is amazing how the bezel changes the entire look.

I owned a Sinn U1 and can say that this version just has a different appeal. Very nice move by Sinn. Now it's time for the U1000 SDR.