Sinn U50 Professional Fully Tegimented Limited Edition

SKU: SI-590

Watch Brand: Sinn

Sinn North America

Limited Edition 150 Pieces

The most advanced U50 Sinn has created
• Watch diameter (mm): 41.0
• Watch height (mm): 12.5
• 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
• Warranty service: RGM or Sinn

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Permanently Sold Out
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition

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Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Sinn U50 Professional Fully Tegimented Limited Edition
Product Details

Permanently Sold Out

This is a brand new release from Sinn, and was designed and produced exclusively for WatchBuys.

All pieces in this limited edition have been sold.

If you have placed a deposit for this watch and need to review the delivery estimates, please click here.

North American Limited Edition of 150 Pieces

Welcome to the Sinn U50 Professional Fully Tegimented Limited Edition, the most advanced U50 created by Sinn.  This watch was developed for WatchBuys by Sinn and has been in the design and production processes for over one year.


Before we get into the specifics about this watch, some background information is helpful.

Years ago we met Chris Shortell at our New York Road Show, and Chris approached us with an interesting statement - "I have an idea for a better U1 if you are interested".

We were both interested and ready to hear his ideas, and Chris worked with us in 2016 to design the Sinn U1 Professional, a watch that has become somewhat legendary among those who know Sinn.

If you were lucky enough to own a Sinn U1 Professional, you know how well this watch was made, and why listening to Chris was critical to its release.  That watch too was a limited edition, and all pieces quickly sold out.

When Sinn introduced the first Sinn U50, we again contacted Chris to discuss a professional version of that watch, and the Sinn U50 Professional is now a reality.

We thank Chris for his invaluable input, ideas, and time to develop both the original Sinn U1 Professional and the new Sinn U50 Professional.

What Makes This Watch Professional?

"Professional" is a term that is thrown around on many products without a lot of substantive meaning, but in the case of this new watch the word actually means something.

In creating this watch, Chris and we had two primary goals:

1.  Create the most advanced Sinn U50 made with a number of "firsts" never before used on this model.

2.  Design a clean and uncluttered dial with a color scheme to provide maximum legibility with outstanding lume.

Many of you will recognize that the overall design was inspired by the simplicity and colors of the Sinn EZM 1.

The new Sinn U50 Professional differs from the standard Sinn U50 in the following important ways:
  • First Sinn U50 to feature a domed sapphire crystal rather than flat for superior water resistance and legibility

  • First Sinn U50 to relocate the crown to the left side of the case as Sinn does with many of their Mission Timer EZM special forces watches

  • First Sinn U50 to feature white BGW9 Super Luminova for superior visibility and lume at night (BGW9 has a relative brightness of 300% higher than the C1 used on the standard Sinn U50)

  • First Sinn U50 with time only display (no date) for clean layout and improved legibility

  • First Sinn U50 designed with the color scheme featured in the Sinn EZM 1

  • First Sinn U50 to combine all of these features in a fully Tegimented (hardened case), including the bezel, the crown, and case back
Combine these "firsts" and you have the Sinn U50 Professional.

Other features of the Sinn U50 Professional include:
  • Completely made of high-strength salt water and corrosion resistant German Submarine Steel
  • Case made in Glashutte, Germany by SUG
  • Case is fully Tegimented (hardened) for superior resistance to scratches, dings and abrasions
  • Black hardened PVD/DLC bezel with Tegiment technology
  • Tested based on European diving equipment standards and certified by DNV GL
  • Captive bezel with minute ratcheting
  • Crown at 10 to prevent pressure on the back of the hand
  • Domed sapphire crystal
  • BGW9 Super Luminova for superior visibility at night
  • Low pressure resistant to secure sapphire crystal at high altitudes
  • Water resistant to 500 meters

This watch is fitted with your choice of a Sinn silicone rubber strap with fully Tegimented divers locking buckle, or a Sinn fully Tegimented H-Link steel bracelet. 

Differences From the Sinn U1 Professional

There are two primary size differences between the new Sinn U50 Professional and the original Sinn U1 Professional.

First, the case diameter.  The Sinn U50 Professional checks in at 41 mm, 3 mm less than the Sinn U1 Professional and a perfect size for most wrists.

Second, the case thickness.  At just 12.5 mm in height including the new domed sapphire crystal, the Sinn U50 Professional is over 2 mm thinner than the Sinn U1 Professional.

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

Built for Professional Use

As its name suggests, the Sinn U50 Professional Limited Edition is rated for professional use.

The uni-directional rotating bezel is milled from the same submarine steel as the case and is Tegimented. It is further hardened with a black PVD finish.  The indices are machined directly into the bezel without the use of bezel inserts, which can corrode or come loose at deep depths. 

Unlike the standard Sinn U50, the bezel indices and numerals on the Sinn U50 Professional are all white for maximum contrast against the black bezel.

You'll also notice that the crown has been strategically moved from its typical position at 4 to 10 on this model.  This modification allows access to the crown while wearing gloves, and also prevents the crown from digging into the back of the wearer's hand.

Another change to the Sinn U50 Professional is the use of only white and black on the hands rather than red.  These highly contrasting colors improve legibility both above and under water.

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


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