Sinn 140 St Fully Tegimented SZ-01 Calibre on Strap

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• Verified Watch Owner Reviews (3 reviews)
SKU: SI-336

Watch Brand: Sinn

Sinn North America

Automatic winding mechanical chronograph
• Watch diameter (mm): 44.0
• Watch height (mm): 15.0
• Lug width (mm): 22
• Lug to lug (mm): 46
• Weight - head only (grams): 118
• Water resistance: 100 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Tegimented hardened steel
• Dial color: Black
• Front crystal: Sapphire
• Tegimented: Fully
• Inert gas: Filled
• Sinn calibre: SZ-01
• Copper sulphate: Capsule
• Movement: Automatic mechanical
• Strap or bracelet: Strap
• Manufacturer's limited warranty: 3 years
• Warranty service: Sinn Germany

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WatchBuys Direct Price: $4,950.00
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 140 St on Strap SZ-01 Calibre
Sinn 140 St Fully Tegimented SZ-01 Calibre on Strap

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Product Details

A New Classic

The Sinn 140 and 142 Series have been two of the most historically important watches since the company was founded.

Both series have become famous in watchmaking and space flight history.

The German physicist and astronaut Reinhard Furrer wore the Sinn 140 S on his wrist during the D-1 Spacelab mission in 1985. He was therefore able to demonstrate that automatic watches can function even in a weightless environment.

In 1992 the German astronaut Klaus-Dietrich Flade took his Sinn 142 S along with him on the Mir 92 mission.

Sinn's SZ-01 Movement With Central Chronograph Hand

Although the original Sinn 140 St has long since been retired, Sinn has now subjected the 140 Series to further refinement, technology and development, and introduces the 140 St series as offering the "very best of Sinn".

First, this watch features the Sinn SZ-01 movement in development for over seven years and first introduced on the Sinn EZM 10 TESTAF,

Many of Sinn's earlier 140 and 142 chronographs used the Lemania 5100 (and 1341) as the base caliber. This movement proved to be quite popular especially with the military who approved its use primarily based on its use of a large centrally mounted hand to show elapsed minutes.

Since that movement was discontinued, and other chronograph movements did not support these displays, Sinn announced many years ago that one of their goals was to create a number of in-house modifications to replicate the functions of the Lemania 5100.

Little did Sinn know the extent of the modifications that would be necessary, and that this project would extend over seven years.

Specifically, Sinn shows the elapsed minutes through a centrally mounted hand with a distinctive airplane pointer. The watch also features a centrally mounted elapsed second hand as well as an additional time second hand in the register at 9 which runs irrespective of the chronograph.

The result is an easy to read timing system with a large central hand that counts elapsed minutes on a 60 minute scale rather than 30, and a minute stopwatch scale which is visible around the entire circumference of the dial.

The Sinn 140 St also features an impressive array of Sinn technologies to ensure that it provides years of reliable use:

  • Stainless steel hardened Tegimented case
  • Dehumidifying Technology system prevents fogging
  • Nickel free case back
  • Sapphire crystal with dual AR coating
  • Rotating inner pilot's bezel activated through crown at 10
  • Chronograph pushers and crown use Sinn's D3 case integration
  • Matte black dial with electroplated counters
  • Water resistant to 100 meters
  • Weight without strap: 118 grams

Tegimented Steel

The Sinn 140 St features an all Tegimented case construction. 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.

Dehumidifying Technology

Mechanical watches require oils to ensure proper operation, and the proper care of any mechanical watch movement mandates that these oils maintain both their viscosity and lubrication properties.

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. 

This inert gas mixture, signified by the Ar symbol on the dial, is used to fill the watch case prior to being sealed.  This will prevent air from entering the watch case, which will promote a dry and stable environment, but also prevents the dial and crystal from fogging.

The second aspect of this technology is a dehumidifying copper sulfate capsule that absorbs unavoidable diffused atmospheric moisture within the watch, thus slowing down the aging process of the movement inside. A second advantage is that any condensation that were to develop does not appear underneath the crystal, even in very humid weather conditions.

The dehumidifying capsule turns various shades of blue according to its degree of saturation, displayed through a small sapphire crystal window.

D3 System

In conventional watch designs, the chronograph pushers and crown shaft are mounted in the via an insert tube.

This tube requires the use of a tube seal and provides a potential source of gas diffusion (in watches featuring Dehumidifying Technology), but would also allow for water to enter the case if a chronograph pusher were inadvertently pushed or a crown was left unscrewed.

This is because the pusher and crown can shift in the tube if exposed to lateral movement which breaks the seal and allows moisture to penetrate the case. Likewise, with the crown, there is a similar risk that exists when it is unscrewed to make an adjustment.

Sinn developed the D3 System to prevent this risk as the Sinn D3 System features chronograph pushers and crown shafts that are mounted directly into the case – thus creating a perfect seal.

The D3-System permits the crown and push-piece to be integrated into the case, providing reliable protection from lateral knocks and the penetration of dust or moisture.

The Sinn 140 St features 100 meters of water resistance and come equipped with a black calf leather strap with white contrast stitching and signed Sinn tang 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 (3 reviews)

Here's what I learned about this watch

"Here's what I learned about this watch"

Verified Watch Owner Comments: Make no mistake, this is a big watch. However, thanks to the lugless design I think it would work quite well on smaller wrists. Mine is just below average and I find it quite nice to wear.

The leather strap is excellent and should accommodate wrist sizes from about 6.4 to 8. It does need 2-3 days to properly break in. On wrist the movement runs +1.5 spd on average. I'm quite pleased with mine.

Everything I had hoped this watch would be.

"Everything I had hoped this watch would be."

Verified Watch Owner Comments: This is a fantastic well-built tool watch that has exceeded my expectations. I could write a book on all the tremendous things built into this watch. But I'll leave it at if you are a genuine tool watch guy, this is one to have in your collection.

The watch wears large and is thick. The rounded edges allow it to be worn with a dress shirt without issue. The strap is next level. There are a couple of negatives: The strap barely fits my 7.25-7.5 wrist. If your wrist is larger than 7.25, I would probably consider going with the bracelet. The rotor is exceptionally noisy in this watch.

Overall thumbs up, one of my favorite watches!

It grows on you

"It grows on you"

Verified Watch Owner Comments: Normally, 44mm+ is too large, but this is a unique watch. It’s round but oval at the same time with angles cut into the case that make it very pleasing to the eye.

I have 4 older watches using the Lemania 5100 movement. So I love the minute counter using the complete dial rather than a sub-register like most chronos - easy and quick to read elapsed minutes. This is my second 140. I bought the limited edition 140A in 2013 with silver sub registers and polished steel.

Surprisingly, I like this one better for readability and aesthetics. Only complaint- the moveable minutes under the crystal that performs like a moveable bezel on a diver’s watch is too easy to turn and disturb after setting the minutes. Love the watch!