Sinn 356 Flieger Acrylic on Strap

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• Verified Watch Owner Reviews (21 reviews)
SKU: SI-090

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: Strap
• Manufacturer's limited warranty: 2 years
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $2,290.00
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 Strap
Sinn 356 Flieger Acrylic on Strap

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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.

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 (21 reviews)

Superb piece

"Superb piece"

Verified Watch Owner Comments: After a very long time I finally pulled the trigger and purchase this watch. I could not be happier. It is funny but I was worried about the sickness. It is not worth it at all. Another thing that I was concerned about was smudges and scratches on the acrylic crystal. Yes it’s true it happens, but to be honest it is barely noticeable.

What I love most about the watch is how comfortable it is, and how incredibly legible it is. I love the distortion of the numbers when you tilt the watch around, I also love how light it is. I thought it would be heavy but it actually wears pretty light. Every time I look at this watch I realize just how beautiful it is.

The biggest take away is that this watch is making me think about getting even more SINN watches. Trust me - take it from someone who took a very long time thinking about whether to buy this watch. It is totally worth it.

There's nothing like it.

"There's nothing like it."

Verified Watch Owner Comments: I've been considering buying this watch off-an-on for 20 years, and now that I have one I can't believe I waited so long. The dial you you see in pictures, but the genius of the case design you have to experience. It's incredible how easily its 15.5mm thickness wears on a 6.75-inch wrist.

And with the (gorgeous!) acrylic crystal, it's lighter than a Sinn 104. The matte finish is nearly satin. The only downside was the regulation wasn't great: -10 seconds a day. I had the wherewithal to regulate it myself, and the Sellita 500 makes that easier than a VJ7750, I think.

Perfectly sized, flawlessly detailed, incredible value

"Perfectly sized, flawlessly detailed, incredible value"

Verified Watch Owner Comments: I hemmed and hawed over choosing a modestly-sized watch in this price range, where Oris, Nomos, Bell & Ross, Farer, and Tudor all have offerings. Ultimately, I chose the Sinn 356 Flieger, and I'm really happy that I did. Every single detail is up-to-snuff. The bead-blasted finishing is impeccable. The chronograph hands are in perfect alignment with their registers. The day and date wheels are black-on-white to match the dial. I didn't expect to be impressed by the accuracy of this watch, but I am. So far it has been running at +/- 1-2 seconds/day. And this watch is a strap beast. Depending on your choice of strap, you can easily dress this watch for formal or laid-back occasions. All the other brands I mentioned check some of these boxes, but you certainly won't find a chronograph in their catalogs at this price. And you won't get the buttery-domed crystal that makes the Sinn 356 Flieger a standout. The WatchBuys team was great, by the way. The watch arrived at the promised t... - more details

Flawless Purchase

"Flawless Purchase"

Verified Watch Owner Comments: I just received this Sinn 356 on strap a few minutes ago, and the watch is everything I’d envisioned and more. The overall size is a hair smaller than I’d imagined (for two years) but it looks so conservative and classy at this size.

Trey and the WatchBuys team were thoughtful, responsive and prompt with all communication, and I’d recommend them as a first-call when you’re looking for your next watch. This transaction has been flawless.

Great daily wearer

"Great daily wearer"

Verified Watch Owner Comments: The Sinn 356 Flieger has been continously on my wrist since I received it three weeks ago. I love everything this watch has to offer. I haven't seen any mentioned of COSC rating associated with this watch but so far it has been very accurate. At 38.5 mm the diameter is ideal for me but, if Sinn can find a way to shave off a couple of mm in thickness, it would be perfect.

Even with all information on the dial, the watch is easy to read, and at certain angle the dome acrylic offers an intriguing/delighfully distorted view of the dial. All in all, this watch is very satisfying to own and wear especially when it can be had for a fraction of the cost of a Daytonna, Speedy, or a Panni (even after the price hike!).



Verified Watch Owner Comments: I love the simplicity!

Sinn 356 acrylic

"Sinn 356 acrylic"

Verified Watch Owner Comments: Ok so I have probably bought 5-6 watches so far from watchbuys and they really do have impeccable service. All my other Sinn watches are literally amazing but the watch I received had a very small crack in the acrylic crystal. I was going to deal with it because this watch is so friggin cool but, everytime I looked at the watch my eye was drawn to the affected area. After contacting watchbuys they gave me a couple options and ended up sending the watch in for repairs. They were extremely fast getting back to me as well as quickly finding a solution to the problem. This watch was a engagement present from my future wife and I hope I can get it back in time in perfect shape for our wedding. If that happens I'll be extremely grateful. Things happen, but I feel that watchbuys handled this issue with the customers satisfaction in mind instead of just saying uhh ya know I don't know what to tell you. I'll be back once again for a Fortis or a Nomos watch in the future. As for Sinn, I love... - more details

Sinn 356

"Sinn 356"

Verified Watch Owner Comments: After receiving my Sinn 356...I have to say it looks stunning in person. Being it’s a 38.5mm one would think it would be on the small side but having a thin bezel and being a chronograph it’s quite pleasing to wear on my 7.25 wrist.

The dial has a timeless design and is quite legible for a chronograph. I love the look of the acrylic crystal and even though the acrylic crystal can get scratches (can be buffed out) there is something about the way a domed acrylic crystal captures the light and distorts the numerals...very cool!

Overall an amazing looking chronograph and would recommend the Sinn 356!

Great Watch

"Great Watch"

Verified Watch Owner Comments: And easy process. Had the ship date pushed back a day with no issues. Watch is amazing.



Verified Watch Owner Comments: Watch is beautiful. Regularly receive comments. the face is a bit small, but the watch has presence on the wrist. Sharpe, purposeful, and handsome look. Wears well with both casual and dress attire. Reserve battery tends to last about 36 hours for me. Every week my watch seems to be -5 seconds or so, but this really isn't much of a concern for me. Would highly recommend for someone looking for a handsome and quality watch that no one you know will have heard of or owned.

Was a bit hesitant to buy a watch without seeing it or knowing anything about the seller (watchbuys). Couldn't be happier with the process. Received a call promptly after ordering the watch and a rep went over critical details with me. Very transparent and easy to work with. Immediately alleviated my concerns.

I will not hesitate to shop with them again.

Nice Flieger!

"Nice Flieger!"

Verified Watch Owner Comments: I really like the look of this watch. My first watch with a Hesalite crystal. It adds a nice effect when looking at the dial. Performance so far has not been as good as I hoped. Seeing +10-15 s/d. Hoping it will improve. Chronograph is working great.

Most of my watches are larger but this watch wears bigger than I thought it would. I was also considering the 358 Diapal but liked the classic look of the 356.

Sinn 356

"Sinn 356"

Verified Watch Owner Comments: I've worn the 356 for three weeks and I'm really enjoying it. This is my first Sinn and first chronograph. I have a small wrist and the 38.5 mm case is perfect for me. It’s keeping incredible time and I strongly urge you to not avoid the acrylic crystal model. It's lovely.

Watchbuys service was great.

Topnotch watch!

"Topnotch watch!"

Verified Watch Owner Comments: I'd been pining for the Sinn 356 Flieger Acrylic on a strap for a couple of years. Meanwhile, I watched it go through a couple of $100-price increases. So I finally decided to spring for it and, now that I have it, I couldn't be happier.

First off, it's a perfect fit for my 6.5 wrist. Second, I thought that Sinn's replacing the Valjoux 7750 with the Sellita SW500 was going to be a deal-breaker for me, but so far the Sellita actually out performs the chronograph I have with a 7750.

All in all, I'm very satisfied with my purchase. And, both Rob and Kevin at WatchBuys were very helpful, attentive, and responsive to my pre-purchase inquiries about the 356.

What a beauty

"What a beauty"

Verified Watch Owner Comments: Such pleasure doing with Watchbuys. I love my Sinn 356. It is such a classic watch and Ive been wanting for ages. Extremely comfortable to wear on the leather strap. Equally at home on a nylon G-10.

I love everything about this watch.

356 Flieger

"356 Flieger"

Verified Watch Owner Comments: The Canadian customs and duty were very expensive and added lot to the price of the watch.

The watch itself is very nice and is extemely accurate. The finish is very beautiful and I am very happy with this watch. I replaced the black strap that came with it with a vintage leather brown strap also made in Germany.

The quality is the best.

Sinn 356 Flierger

"Sinn 356 Flierger"

Verified Watch Owner Comments: The buying experience from Watchbuys was one of the most pleasant that I have had.

Communications was excellent and the watch was delivered as promised.

The Sinn 356 is a beautifully made watch and has been averaging 6.5 seconds per day over a week. I have had some trouble resetting the chrono, however, when the minute counter is in the 13-16 minute range. Not big enough a problem for me yet to return it for service, would hate to give it up that long.

Overall the watch is a great classic chronograph and suits me perfectly.

Awesome watch

"Awesome watch"

Verified Watch Owner Comments: I was torn between the Sinn 356 and the Damasko DC56. After doing some research, I opted for the Sinn with its classic profile.

I'm glad I did.

It's a gorgeous watch, and sized just right. It has presence without being ostentatious. The materials Damasko uses may be better, but the look and feel of the Sinn 356 is, in for my money, the better choice. And the good people at WatchBuys could not have been more helpful.

I'm a happy customer.

Sinn 356 Is Perfect Everyday Watch

"Sinn 356 Is Perfect Everyday Watch"

Verified Watch Owner Comments: This watch is the perfect timepiece for any occasion. 

It's sporty and dresses up pretty well too. I ordered it with the rubber strap and I've worn it nearly every day for the past month. I wasn't expecting to like as much as I do, but it's a great watch. 

Keeps accurate time as well.

Fantastic Flieger!

"Fantastic Flieger!"

Verified Watch Owner Comments: I have always been a Flieger fan, and I love this Sinn 356 due to its styling and size. 38-40mm is the sweet spot for my 6.5 inch wrist. Great build quality and the acrylic really gives it a vintage period look.

The watch arrived carefully packed in a non-descriptive package for security. I am very happy with this purchase and would do so again. And thanks to Rob at Watchbuys for his quick and helpful email response (on a weekend)!



Verified Watch Owner Comments: A very beautiful and classically designed piece. Timeless. Perfect size, with good height. But the acrylic is what makes this.

It's amazing. I love this watch.



Verified Watch Owner Comments: My Rolex Sub and my Omega SeaMaster have not been worn. The Sinn 356 is much more accurate.

Wish I had found Sinn before purchasing the Rolex or the Omega.