Sinn 857 UTC Fully Tegimented on Strap

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• Verified Watch Owner Reviews (10 reviews)
SKU: SI-176

Watch Brand: Sinn

Sinn North America

Automatic winding with second time zone
• Watch diameter (mm): 43.0
• Watch height (mm): 12.0
• Lug width (mm): 22
• Lug to lug (mm): 49
• Weight - head only (grams): 90
• Water resistance: 200 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Tegimented hardened steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Inert gas: Filled
• Calibre: SW330-1
• 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: $2,680.00
Availability: Temporarily Sold Out

Sinn 857 UTC Tegimented on Strap
Sinn 857 UTC Fully Tegimented on Strap

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Product Details

Sinn's inspiration for the design of this watch is the historic Sinn NaBo clocks, long manufactured for use in cockpits as a navigational tool.  Even today Sinn continues to produce these clocks which are used in both civilian and military aircraft, as well as specialty cars.

Sinn Tegiment ProcessTo create this watch, Sinn built on the extremely popular design of the Sinn 856 UTC dual time zone watch created a larger case size with bezel.

On a frequent basis we receive client praise for Sinn's "Tegiment" (hardening) technology, and have heard quite a few stories of watch cases scraped against metal railings, car doors, metal desks, and other more interesting objects with little to no damage to the case.

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 layer has a hardness of 1,200 Vickers which is up to five times harder than standard steel.

The Tegiment layer 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 even further improved by the Tegiment hardening process.

The case back is nickel free, perfect for those with allergic reactions to case metals. Other features include protection from magnetic fields of up to 80,000 A/m, sapphire crystal with anti-reflective coating on both sides.

Another Sinn engineering feat is the creation of a bezel that is secured by screws.  The inlaid aluminum ring featuring numerals and markers is anodized black for optimal legibility, while the triangle reference marker at 12 is applied with special paint for visibility.

The case features a copper sulphate capsule which reacts with moisture to diffuse and absorb humidity in the watch. This capsule may be viewed through a porthole in the left lug, and over time will turn a deep blue as humidity is absorbed.

This technology not only provides a more stable environment for the movement, but also helps to prevent fogging of the crystal when going from hot to cold environments or from humid to non-humid conditions (such air conditioned buildings).

This watch has a second time zone displayed by a skeleton yellow-green tipped hour hand. The second time zone can be set directly through the second position of the crown and uses a 24 hour indication to differentiate AM and PM.

Sand-blasted stainless steel case with solid back. Dial is matte black with Arabic numerals and offset date display at 4. The design and layout of this watch make it extremely easy to read in virtually all light conditions.

Sapphire crystal with luminous hands, hour markers and the 12. Watch is water resistant to 20 ATM.

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)

Feature packed banger of a timepiece

"Feature packed banger of a timepiece"

Verified Watch Owner Comments: I hemmed and hawed over purchasing this one, mostly because I thought my wife would kill me for getting another watch. But it’s her fault for marrying me (and contributing to the problem with a Sinn 104 white dial matte finish on a bracelet for Christmas) so I pulled the trigger and couldn’t be more pleased. Fully tegimented case, inert gas filled, active dehumidifying with the copper sulphate, bi directional (unreal action on it) count up bezel, two time zones (and you can quick set the date, instead of cycling through the UTC hand!) and absolutely brilliant lume on an incredibly legible dial all on an outstandingly substantial leather strap (has the look of a bund strap, without the bulk underneath the watch). This watch is packed with all manner of awesome Sinn tech with their classic functionally elegant esthetic. Wears very well because of its short lug to lug dimensions and relatively thin case can absolutely be worn under a cuff. Drilled lug holes are a much appreciated bonu... - more details

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"Sinn 857 utc"

Verified Watch Owner Comments: Nice case size, tegimented, crisp dial. Solid watch and strap. Highly recommended.

Great Tool Watch

"Great Tool Watch"

Verified Watch Owner Comments: I just received my watch and first have to comment about the buying experience. Watchbuys provided me with an amazing experience. I had questions about the watch and they answered everything, helped me place the order. This company did a great job at ensuring my watch arrived safe and sound. It was even set to the right time when i opened the package.

The watch itself is a decent size. Not too big or small. Reminds me of the older Rolex GMT's. the bead blasting gives the watch a greyish look which is very striking. The watch looks professional and sturdy. It doesn't sit too high off the wrist, no more than most digital watches.

I am much happier with this watch than I was with my Rolex GMT.

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"Sinn 857 UTC"

Verified Watch Owner Comments: Very happy with the Sinn 857 UTC so far. Very robust watch, I like the fact that I don't have to baby it like other pieces in my collection. Really like the piece of mind having the anti-magnetic protection while traveling and working around computer equipment. I agree with another review that it would be nice if the UTC hand had lume.

Service at Watchbuys was great! I like the fact that they call you before shipping. Nice, personal touch. Watch was pre-set and running upon receipt which was a nice additional surprise.

Great design

"Great design"

Verified Watch Owner Comments: This is a great watch for any occasion. It's highly legible and very comfortable. I'm wearing it on a rubber strap and deployment clasp. It's the right size for my 7.5 wrist. I like that fact that it is thin enough to fit nicely under a dress shirt.

Overall I am very pleased with it.



Verified Watch Owner Comments: Amazing service, fast shipping! Watch is exactly as described.

Will use WatchBuys again!

Excellent Watch!

"Excellent Watch!"

Verified Watch Owner Comments: I love my 857 UTC!

I was concerned that the watch, at 43mm, would be too large since I typically wear a 40mm, but the 857 has perfect presence on my 7.5" wrist. Importantly, it fits under the cuff of a dress shirt easily. The workmanship and fit and finish are impressive. Visibility is great and it's the easiest to read watch I've ever had. Accuracy has been good with the watch gaining about 2 seconds per day.

The guys at Watchbuys are great to deal with. Like many, I had reservations about purchasing a watch I could not see in person or try on... but the customer service from WB was perfect.

Great instrument

"Great instrument"

Verified Watch Owner Comments: I bought the 857 a while back and have really enjoyed it ever since.

It's robust, well engineered, and not a "me too" watch. I was so impressed by the quality of the Sinn that I have bought another (EZM3) and will likely buy more in the future.

To be honest, I don't like the readability of the second time register since the dial is so small, but otherwise I think it's a terrific watch.

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"Sinn 857"

Verified Watch Owner Comments: This was my second Sinn purchase. I went with the Fliegerstaffel originally, but realized chronographs are a little thick for me.

The 857 has nice weight, great black dial looks, and reads quickly, unlike some busy GMT watches out there.

I'm very happy with my purchase and with the exemplary service from WatchBuys.

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"Sinn 857"

Verified Watch Owner Comments: I tortured myself for several months before ordering the 857. When it arrived, it exceeded my expectations. The fit and finish is near flawless, the bezel turns smoothly and lines up precisely, the crown screws in and out with aplomb, and the dial is precise as well.

I have the double strap and it was stiff at first but after a week and a half it is like an old friend. Timekeeping is precise and consistent with very little positional variance. I am happy to have added this watch to my collection and it has been worn constantly since arrival.

I highly recommend the 857 to anyone looking for a well built pilots/tool watch. A winner!!!