Sinn 356 Flieger Acrylic on H-Link Bracelet

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• Verified Watch Owner Reviews (15 reviews)
SKU: SI-107

Watch Brand: Sinn

Sinn North America

Automatic winding chronograph
• Watch diameter (mm): 38.5
• Watch height (mm): 15.5
• Lug width (mm): 20
• Lug to lug (mm): 46
• Weight - head only (grams): 71
• Water resistance: 100 meters
• Case back: Solid
• Case finish: Matte
• Case metal: Stainless steel
• Dial color: Black
• Front crystal: Acrylic
• Calibre: SW500
• Movement: Automatic mechanical
• Strap or bracelet: Bracelet
• Bracelet finish: Matte
• Manufacturer's limited warranty: 2 years
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $2,570.00
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 356 Flieger Acrylic on Bracelet
Sinn 356 Flieger Acrylic on H-Link Bracelet

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Product Details

This is the original version of the Sinn 356 which is fitted with an acrylic cover in keeping with the historic German flieger design.

This is one of the best selling Sinn watches in the entire line, and is noted for its clean design and easy readability.

Automatic winding mechanical chronograph movement. Functions include hours, minutes, subsidiary seconds, date, day and complete chronograph functions.

Case is in sand-blasted steel with solid case back. Other features include screw down crown with protective horns, screw in back and water resistance to 10 ATM.

Sinn stainless steel H-Link bracelet.

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 (15 reviews)

Almost perfect tool watch

"Almost perfect tool watch"

Verified Watch Owner Comments: The watch ticks all the boxes for an all-around, no-nonsense chronograph. Perfect size for my wrist of size 7 inch. It would be perfect if the thickness could reduce another inch or so.

The most optimal watch

"The most optimal watch"

Verified Watch Owner Comments: I absolutely love my 356. There simply is no other chronograph so compact yet legible and intelligently laid out.

Fantastic Pilot/Everyday Chronograph

"Fantastic Pilot/Everyday Chronograph"

Verified Watch Owner Comments: First of all, I had an overall fantastic experience with WatchBuys!

I love the no nonsense aesthetic and quality of Sinn watches. This 356 is the perfect size for me. It's got a great cohesive design and lots of charm. The only hard decision will be to decide which version of the 356 to get.

Even better than I was expecting

"Even better than I was expecting"

Verified Watch Owner Comments: My first Sinn and first luxury watch. I knew I had to choose the 356 as it checked so many boxes. Perfect size, chronograph, German brand, tool watch. I made a deal with myself I would buy the watch after I finished rehabbing a duplex (after countless hours). After becoming a father. After getting in better shape. After getting a raise at work. Each time I achieved one of these goals I would convince myself I should wait and I'd set a new goal. Finally I realized I would never find the right time to buy it because there is never a fully practical reason to buy a luxury watch. That's why it's a luxury. As a designer and mechanically minded person it's just a little mechanical treasure I've always admired and I had to decide if I really wanted it or not. Not if I finally deserved it or not. I bought it that night. It took 6 weeks of patience for it to finally come in but it was absolutely worth the wait. My wife is very excited for me and even my little 2 year old thinks the chronogr... - more details

Sinn 356 Flieger Acrylic

"Sinn 356 Flieger Acrylic"

Verified Watch Owner Comments: This watch arrived exactly as expected and was well packaged. The acrylic glass was initially a slight concern as I tend to prefer sapphire however I wanted the look this type of domed crystal provides. Upon arrival I was pleased to see how this crystal takes the view of the dial to another level.

After arrival I contacted Watchbuys with a concern about the watch and they immediately offered to send a replacement without any hesitation. However we were able to resolve the potential issue with the watch and no exchange was necessary (over a week later and it is performing flawlessly).

This commitment to no-hassle customer service will result in me buying from them again. I couldn't be happier with my purchase!

Outstanding watch, great experience

"Outstanding watch, great experience"

Verified Watch Owner Comments: This is my first Sinn watch and it exceeded my expectations. Bracelet is super comfortable and I'm continually impressed with how they fit all legibility and complications in 38mm. Included tooling to resize the watch.

Love wearing my flieger!

Pleasantly Surprised

"Pleasantly Surprised"

Verified Watch Owner Comments: I was pleasantly surprised that a watch of this size (height) and weight would disappear on my wrist. It slips under my sleeves better than other watches I have with much lower profiles and the case back shape is very comfortable on my wrist. Fit and finish are wonderful and the bracelet works very well with the watch. This isn't my newest, or most expensive watch, but it is the one I have been wearing (and enjoying) day to day.

Watchbuys let me know when the watch was expected to be available so I could place my order and, overall, I couldn't be happier with the service.

Meets expectations and further

"Meets expectations and further"

Verified Watch Owner Comments: Did some research and positive feedback with Watchbuys, called with questions all answered thoroughly. Came quickly and all as expected.

What wears perfect at 38.5, the bracelet is solid. Despite some talk about the clasp, does the job.

Great watch

"Great watch"

Verified Watch Owner Comments: This is a great watches that checks a lot of boxes: -Swiss movement (mine running < +6s / day) -Great vintage style -Brand indentiy/heritage -Robust construction for daily wear Before buying this, I hummed and hawed over making the extra jump (more like leap) for a Speedmaster - really glad I settled on this instead.

Sinn 356 Flieger acrylic

"Sinn 356 Flieger acrylic"

Verified Watch Owner Comments: Fantastic product and great customer service. All questions answered and personal phone call prior to shipping is a really nice touch. Shipping was lightning fast and item came as advertised and well packaged.

Would recommend WatchBuys to anyone.

Very satisfied with purchase

"Very satisfied with purchase"

Verified Watch Owner Comments: I have had my eye on the Sinn 356 for a few years, especially since I attended one of Watchbuys roadshows to see the model in person.

The 356 is an extremely satisfying, high-quality piece of timekeeping art. The time is clear and legible, the chronograph functions perfectly without the size or clutter of a large (and unnecessary) tachometer bezel, and the fit and finish on the bracelet and case are absolutely fantastic. The build quality and reassuring weight really exceeded my expectations.

The watchbuys folks were also extremely helpful and professional with me, both at the roadshow and on the phone and via e-mail. I would definitely purchase any future German timekeepers from them without hesitation.



Verified Watch Owner Comments: Love it. I was concerned that the diameter was smaller than i normally would consider, but the way it sits on wrist is perfect and beautiful. The case height and the crystal bubble give it a perfect presence, and I have a very large wrist. Design details over time become more appealing, like the arm extensions and the perfect proportions.

Can't take it off.

Totally Satisfied

"Totally Satisfied"

Verified Watch Owner Comments: This was my first experience purchasing from WatchBuys and it was as pleasant as others have reported. The follow call to confirm my order and shipment details was quick and courteous and any questions I had were answered. I will not hesitate to order from them again in the future.

As for the watch, it was everything I expected and I have no complaints. Arrived very securely packed, in perfect condition, and with the time already set. The satin finished case and bracelet look great and the watch wears very comfortably. I am very glad I went with the acrylic crystal as the high dome adds a great deal of personality. I'm totally satisfied with the purchase.

Great watch at a great value.

"Great watch at a great value."

Verified Watch Owner Comments: Very pleased. This model has a feel of what I think the 1960s Rolex sport models felt like out of the box new.

Very good fit, finish, and comfort. A true tool watch at a great value.

The perfect flieger chronograph

"The perfect flieger chronograph"

Verified Watch Owner Comments: The Sinn 356 is one of the best looking if not perfect pilot style chronographs made today.

At a respectable 38.5mm in diameter, it glides effortlessly under my dress shirt cuffs whether other Valjoux based 7750 watches have struggled. I was afraid the bead blasted finish of the bracelet would look too toolish with my business attire, but the watch looks right at home with my suits. By excluding the 3, 6, 9, and 12 o'clock numerals, Sinn was able to incorporate reasonably sized, legible subdials and at the same time not make the watch too crowded.

Other little details like the glossy white luminous syringe hands, recessed dials, and arrow heads on the chronograph subdials makes this the perfect vintage style watch I have been looking for.