Sinn 857 Tegimented on Bracelet

Automatic winding with date function
• Case diameter (mm): 43.0
• Case thickness (mm): 12.0
• Case lug width (mm): 22
• Weight - head only (grams): 90
• Case back: Solid
• Case finish: Matte
• Case metal: Tegimented hardened steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Bracelet Tegimented: Fully
• Inert gas: Filled
• Copper sulphate: Capsule
• Antimagnetic: 80,000 A/m
• Movement: Automatic mechanical
• Manufacturer's limited warranty: 3 years
• Warranty service: RGM or Sinn
° Earn 4680 WatchPoint Rewards on this purchase
WatchBuys Direct Price: $2,340.00
Availability: In Stock - Ships Immediately

Sinn 857 Tegimented on Bracelet
Sinn 857 Tegimented on Bracelet
Product Details

To create this watch, Sinn built on the extremely popular design of the Sinn 857 UTC but removed the UTC complication - the result is a brand new watch called the Sinn 857 (Non UTC) on a fully Tegimented bracelet.

The result is a clear, easy to read dial which resembles the now retired Sinn 657 but in a larger size (43 mm) which is fully Tegimented.

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 on this watch has a hardness of 1,200 Vickers which is six 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).

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. Watch is fitted with a Sinn stainless steel bracelet which is fully Tegimented and features a folding clasp.

Other features include Sinn's Dehumidifcation Technology which uses inert gas to reduce humidity and to prevent the dial from fogging.

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, 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 service center, RGM Watch Service located in Mount Joy, Pennsylvania. This added service saves our clients the time and effort of returning their watches to Germany for repair. This benefit 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 contact us and we'll provide instructions for shipping the 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 FedEx 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.

Watch Reviews

Simply elegant

"Simply elegant"

Nirav P

Comments about this watch: This watch is very simple, and it's simplicity fits with everything other than formal clothing. The more I wear it the more I appreciate the simple looks. The tengimented steel has held up well through several bangs. I have noticed the watch goes faster - 10 seconds everyday, which is more than I thought it would be.




Comments about this watch: So glad I got this. From the features to the finish it's exactly what I wanted in a timepiece. I feel unstoppable wearing this.

Customer service from WatchBuys was top notch too.

Understated, and finely engineered, well satisfied

"Understated, and finely engineered, well satisfied"

Troy K

Comments about this watch: This is my first mechanical watch. I’m so pleased with my purchase. I’m became obsessed with learning for about 90 days. I’m an engineer and a detail nerd.

Sinn became my brand of choice. I considered so many topics, from AR coating(s), how it will fit under my shirt sleeve. Finally I took the plunge and when it arrived I was so thankful I chose this one. The fit & finish are, exactly as I hoped. Understated, and well engineered.

Watchbuys guys are fantastic watch geeks, and are happy to chat about all the details. Well pleased, and will buy again. (someday when I can get this one off my wrist :-).)

Met all my expectations

"Met all my expectations"


Comments about this watch: This is my first Sinn, and I had my eye on it for many months before finally making the purchase.

When it arrived I was not disappointed.

The quality is excellent and it has rarely left my wrist in the last month. It has everything you'd expect from a piece in this price range, and nothing you don't need. The simple, uncluttered dial was what sold me on this watch from the beginning. The date window tucked neatly in at 4:00 is a nice touch and doesn't detract from the cleanliness of the dial.

I think the proportions of the case are perfect, especially with its relatively short lugs. The 857 is now the favorite in my collection.

Also, a note on the great customer service from WatchBuys; I received a call shortly after placing my order online confirming my order and explaining their policies as it was my first purchase.

I'm looking forward to making my second purchase which will almost definitely be another Sinn!

Sinn 857

"Sinn 857"

David C

Comments about this watch: I live in Canada.

Importing this watch from WatchBuys was a smooth process. A nicely crafted timepiece which has a real presence on my wrist.

The dial is clean and extremely readable thanks to the bold white marking on a matte black background. The lume is bright and lasts when fully charged. The AR coating is on both sides of the sapphire crystal making the crystal seemingly transparent. The bracelet is very comfortable and solid feeling.

The watch has been worn daily in the few weeks since I received it and is keeping about + 4 seconds a day - excellent. A great, quality timepiece for daily wear without the worry of scratching thanks to the tegimenting process.

The only thing I would hope Sinn can improve upon is the very tight clasp - very secure but takes some effort to undo.

Outstanding and practical

"Outstanding and practical"


Comments about this watch: Everything you need and nothing you don't - plenty of water resistance, best bracelet I've used, antimagnetic to an extreme, fully tegimented, clean dial, perfect height and width, firm, bidirectional bezel and all the cool anti moisture technology.

Super functional and practical. Possibly the most underrated Sinn out there.

Perfectly understated

"Perfectly understated"

Rand M

Comments about this watch: What is there not to like about his watch? Well, really nothing. The size of the watch is perfect, not too big and not too small. It easily fits under a shirt cuff. The face is legible and it is as water resistant as any recreational diver needs.

You can wear the watch with jeans or a suit which leads me to the best part. The tegimented steel is very difficult to scratch. Gone are the days of putting on a G-shock because you may scratch your nice watch while you do something around the house, this Sinn can take it. All of those stupid ways you scratched you watch by pulling something out of the washing machine, striking it on the frame of a door or somebody hitting you with a bag in the airport are now behind you.

This watch can take a beating and not only keep ticking but it remains pristine as well. As I said, what is here not to like?

Best. Watch. Ever

"Best. Watch. Ever"


Comments about this watch: I had a Sinn 656 prior to this, which I loved. Moved 'up' to the 856 for the larger size and tegimented case just over a year ago.

This watch is worn daily, not with kid gloves, yet I am yet to see a scratch on the glass or case.

Personally, I love the simple elegance of it's design and superb durability.

Better then expected

"Better then expected"


Comments about this watch: Received this watch on a Saturday just as expected. The color is more of a gun metal which was a little darker then the photos depicted. But to be honest, it has really grown on me. The bright stainless steel is very common but this definitely has its own appearance.

The numbers on the face are clear and the build quality of the case is absolutely fantastic. I was tired of the business of the chrono face and wanted something that just had a sweeping second hand and this will be my daily wear.

I was amazed by the knowledge that the WatchBuys staff offered. Matt, Rob, George and Tim you rock!!

>> Read all watch reviews [] |  Write your own watch review


Rate this watch:        

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.

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) was 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 TESTAF Series


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