Sinn U50-T SDR Fully Tegimented on Bracelet

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• Verified Owner Reviews (6 reviews)
SKU: SI-522

Watch Brand: Sinn

Sinn North America

Midsize U-Series fully Tegimented diver's watch
• Watch diameter (mm): 41.0
• Watch height (mm): 11.2
• Lug width (mm): 20
• Lug to lug (mm): 47
• Weight - head only (grams): 74
• Water resistance: 500 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Submarine steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Movement: Automatic mechanical
• Manufacturer's limited warranty: 2 years
• Strap or bracelet: Bracelet
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $3,340.00
Availability:  In Stock - Ships Immediately

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 U50-T SDR Fully Tegimented on Bracelet
Sinn U50-T SDR Fully Tegimented on Bracelet

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Sinn U50-T SDR Fully Tegimented on Bracelet
Sinn U50-T SDR Fully Tegimented on Bracelet
Sinn U50-T SDR Fully Tegimented on Bracelet
Sinn U50-T SDR Fully Tegimented on Bracelet
Product Details

This is a special version of the Sinn U50 and is produced in very small quantities.  This version features a fully Tegimented (hardened) case and bracelet with black bezel is named the Sinn U50-T SDR.

The Sinn U50-T SDR is all about wearability and versatility.

First, the case size.  For years our clients have requested a midsize version of the bestselling Sinn U1.  The Sinn U50-T SDR checks in at 41 mm, 3 mm less than the Sinn U1 and a perfect size for most wrists.

Second, the case thickness.  At just a hair over 11 mm thick, the Sinn U50-T SDR is even thinner than the popular Sinn 104 and is one of the most comfortable diver's watches in the category.

This case design also provides a 35% reduction in total weight compared to the Sinn U1.

Third, the case material.  The Sinn U50-T SDR case is made from fully Tegimented German submarine steel and features a Tegimented bezel.  

Finally, the water resistance.  Despite the lower profile case size, the Sinn U50-T SDR boasts 500 meters of water resistance.  The same rating can also be expressed as 50 bar, hence the "U50" name.

A Durable 41 mm Fully Tegimented Case

The watch case of the Sinn U50-T SDR is made from the same steel 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 using the material.  

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.

Another important and practical feature of the submarine steel case is corrosion resistance.  The case of the Sinn U50-T SDR resists the effects of exposure to salt water and salt water environments.

Built for Professional Use

As a Sinn U Series watch, the Sinn U50-T SDR is rated for professional use.

The international testing lab of Germanischen Lloyd has tested the Sinn U50-T SDR and certified it as water resistant to 500 meters. This same firm tests submarines for their ability to withstand the effects of underwater use.

The uni-directional rotating bezel is milled from the same submarine steel as the case 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 bold block hour markers are white and offer a stark contrast against the black dial.  The block seconds hand is a bright red.  This unique design gives the Sinn U50-T SDR, and its larger brother the Sinn U1, a distinct look that also provides maximum legibility underwater.

Important features of this watch include:

  • Case made of fully Tegimented German submarine steel
  • Uni-directional Tegimented bezel 
  • Water resistant to 500 meters
  • Date display at 3
  • Low pressure resistant
  • Sapphire crystal with double sided AR coating
  • SuperLuminova on the hands and hours (glows green)

This watch is fitted with a fully Tegimented Sinn stainless steel H-Link bracelet.

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.

DIN 8330 / 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) and DIN 8330 were originally 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 DIN 8330 / TESTAF Series


Watch Reviews From Verified WatchBuys Buyers
100% • Verified Owner Reviews100% • Verified Owner Reviews (6 reviews)

Everything I Hoped For, Stunner

"Everything I Hoped For, Stunner"

Verified Owner Comments: For those that know, for those that do not care for jewelry, or marketing and status, or nods to vintage design, this is the watch. Just screams tool, utility, no nonsense. I have small wrists and the sizing is perfect. The heft, the feel, everything about this piece is obsessively satisfying

Perfect size

"Perfect size"

Verified Owner Comments: I had a U1 for a year and decided to give the U50 a shot. They are definitely two different watches, but the biggest difference to me was that the dial design just looks better on the smaller U50. Both watches are great, but I now prefer the U50 to the U1.

Great purchase - Watch and Customer Service

"Great purchase - Watch and Customer Service"

Verified Owner Comments: First off, the purchasing experience was great. This was a large purchase (for me). It was great having a follow up call the day the watch would be shipping to confirm all the details entered online. Watchbuys confirmed I was purchasing the exact watch I thought I was, the shipping address, payment details, etc.

The watch shipped and delivered in the time promised. The watch is fantastic. Prior to purchasing, I watched every video on youtube and read every review. You don't see these out in the wild, so it was purchased without ever being seen in the metal. It does not disappoint.

I work for a German company and experience German quality and workmanship every day. Sinn reflects these ideals. This watch looks and feels like a no-nonsense quality tool, and it is. In addition, the movement is spectacular. The watch has been running about 0.5 second fast per day. I am very pleased with this purchase.

The perfect watch?

"The perfect watch?"

Verified Owner Comments: Absolutely stellar timepiece. The case proportions and no nonsense utilitarian design is a winner.

Awesome Watch

"Awesome Watch"

Verified Owner Comments: I've been wearing the u50-t for a few months now and it's been fantastic. I wanted a hard wearing tool watch for outdoor adventures and played its roll flawlessly, still looking new even after several scree scrambling treks. Proportions are nice on my 6.5 wrist, definitely not small but the short lug-to-lug helps it wear well.

Like many, I was attracted to its thinness, and while it is thin, visually it doesn't look quite as thin as it sounds because it the midcase is a flat slab that doesn't visually break up the case at all. Bezel action is solid and mechanical feeling with defined clicks not a ratcheting feeling, which I like. Overall great watch, would recommend.

Perfect Everyday Watch

"Perfect Everyday Watch"

Verified Owner Comments: I’m writing this review after owning the watch now for approximately 3 months. I am a dive watch enthusiast. I enjoy the utility and aesthetic of dive watches and I’ve owned a few in my life. This Sinn U50T SDR ranks at the top for the following reasons. (1) The size at 41mm is very manageable on my 6.5 wrist. I’ve owned and worn larger but have always found myself gravitate towards this size due to the balanced proportions on smaller wrist sizes. (2) The comfort is unbelievable. I have not personally weighed the watch but it’s lighter than any Tag Heuer, Tudor and IWC I’ve worn (with the bracelet) while still feeling robust. The tegimenting is certainly cherry on top because I know the bracelet can take the abuse of everyday wear. (3) It keeps excellent time. It runs about +4 seconds a week. Looks is subjective but I think this watch holds its own against some of the most popular dive watches in this price point. The SDR definitely has a sporty allure due to the red hands and beze... - more details