Sinn 103 St Acrylic Matte Special Edition on Strap

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• Verified Buyer Reviews (5 reviews)
SKU: SI-401

Watch Brand: Sinn

Sinn North America

Hand bead blasted finish
• Case diameter (mm): 41.0
• Case thickness (mm): 15.5
• Case lug width (mm): 20
• Lug to lug (mm): 47.5
• Weight - head only (grams): 74
• Water resistance: 200 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Stainless steel
• Dial color: Black
• Front crystal: Acrylic
• Movement: Automatic mechanical
• Manufacturer's limited warranty: 2 years
• Strap or bracelet: Strap
• Warranty service: RGM or Sinn
Learn how to earn 4180 WatchPoint Rewards
WatchBuys Direct Price: $2,090.00
Availability:  In Stock - Ships Immediately

Sinn 103 St Acrylic Matte Special Edition on Strap
Sinn 103 St Acrylic Matte Special Edition on Strap

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Product Details

The Sinn 103 Series has become one of the most iconic collections in the brand's history and the design dates back to the early origins of Sinn as a company.

Using classic design features such as a domed acrylic crystal, friction fit bezel and solid case back, this pilot's watch maintains a level of authenticity that few do in the market today while remaining in current production.

And we decided to turn it up a notch.

Matte Hand Finished Bead Blasted Case

Up until this point, virtually all watches in the Sinn 103 Collection have been finished with highly polished cases.

We were curious to find out how the watch would appear in a matte bead blasted finish so we asked Sinn to produce a prototype which we have been showing at our recent Road Shows.

The feedback that we have received has been strongly positive and many people have remarked that the watch takes on an entirely different appearance.

In keeping with the traditional methods of production of this watch, we asked Sinn to use hand bead blasting techniques. Rather than produce the case on an automated CNC machine which also would bead blast the case, Sinn first produces the case as a standard 103 case and then the matte bead blasted finish is created entirely by hand.

This hand finished blasted finish produces a striking result, and is a time consuming process to correctly complete.  The end result is everything that you've always liked about the Sinn 103 in a much more subtle design without the highly polished finish. 

Of the many variations of the Sinn 103 Series that have been produced over the years, we personally feel that this is one of the most interesting and collectible in the series as it takes on a completely different look.

Another advantage to the matte bead blasted finish is an increased resistance to showing scratches and other blemishes which are much more apparent in a highly polished case design.

Additional features of this limited production watch include:

  •     Automatic winding chronograph movement
  •     Matte bead blasted stainless steel case
  •     Highly domed acrylic crystal    
  •     Bi-directional friction pilot's bezel
  •     Screw down crown with protective horns
  •     Day/date window at 3
  •     Water resistant to 200 meters

This watch is fitted with a Sinn calf leather strap and matte tang buckle.

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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.

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


Watch Reviews From Verified WatchBuys Buyers
100% • Verified Buyer Reviews100% • Verified Buyer Reviews (5 reviews)
Rate this watch: Positive Review  Positive Review Negative Review  Negative Review  

A timeless classic.

"A timeless classic."

Verified Owner Comments: Funny enough, this watch is commonly a first step into ownership of a Sinn watch for many. For me, I've only come around to the 103 after sporting a Sinn of one type or other for the past 10 years. I first picked up a Sinn U1 about 10 years ago and quickly picked up a U212, U2s, U1000s and 857 UTC in the following 4-5 years. I quickly sold the U212 and the U2s simply because the U212 didn't wear well on my wrist and I had to try it for a few months to discover that and the U2s just seemed redundant of the U1 while not being as legible. The U1, U1000s and 857 UTC have been all over the world with me and shared many adventures but I found myself wearing my U1 less and less as I became tired of it. Being the chronic flipper that I am, I ended an 8 year relationship with that watch and sold it a couple years ago. While my U1000s has been sitting, I haven't had the heart to part with it just yet since it's one of the coolest, most unique watches I own. I think of it as my vacation watch... - more details

Hard-Working Tool Chrono

"Hard-Working Tool Chrono"

Verified Owner Comments: The matte finish on this edition reinforces what is great about Sinn watches: they are designed to do a job. The 12-hour chronograph on this watch is perfect for timing tasks, both high- and low-stakes, and I find the ability to track a second elapsed time interval with the bezel to be really useful, too. Think timing an overall trip and an individual leg...or multiple steps of a recipe.

The classic design is legible, precise and a little bit nostalgic, without feeling like its trying too hard. Long story short, an all around great watch.

Love it!

"Love it!"

Verified Owner Comments: This watch is beautiful, and you can tell by the look and feel of it how great the build quality is. It is my first Sinn watch, and I'm so impressed with this model I'm sure it won't be my last. The leather strap is also very nice and comfortable, with thick leather and quality white stitching along the sides. I was hesitant about the acrylic crystal, but I am glad I decided on it versus the more expensive model with the sapphire. The acrylic gives the watch a very cool look which is hard to describe without seeing it in person. It feels warmer than my other watches with sapphire crystals, if that makes any sense. If the acrylic scratches, apparently they are easily buffed out using PolyWatch. It wears very nicely on my 6.5 wrists. It is running +-1 second a day for the two weeks I've been wearing it. I love the bi-directional bezel, and the friction movement makes it more accurate to set versus the standard click movement bezel in other watches I own. It is easy to move, but not e... - more details

A beautiful Chronograph!

"A beautiful Chronograph!"

Verified Owner Comments: I have been looking At chronographs for about six months and decided on a traditional Sinn pilot . It is beautifully made and has a top grade well proven ETA 7750 movement that has been adjusted by Sinn in five positions.

Not only is it a great chronograph but Sinn is not well known in America so it’s unique and the brand has an interesting history Watch buys has been very helpful they are knowledgeable and offer excellent service I also have dealt in the past with RGM Sinn’s authorized service center in the US I consider Roland Murphy and his team at RGM one of the top in the country .

I am 66 and I’ve been collecting watches since the age of 16 when I saved $185 from my paper route to buy an Omega speed master Moonwatch which unfortunately was subsequently stolen from my school locker 🤦‍♂️ I highly recommend Sinn and watch buys !

Tool Watch with Style at A Value Price

"Tool Watch with Style at A Value Price"

Verified Owner Comments: Yes, you can get another brand of Valjoux 7750 watch somewhere else for less, but it wouldn't have anywhere near the time proven design elements - sorry for the bad pun - that have made the Sinn 103 so popular for many years.

The matte finishing of this watch helps to minimize scratches which is a feature I like. Accuracy is around +3 seconds a day, within COSC standards even though it is not chronometer rated.

I am very pleased with this purchase.