Sinn 556 I RS on Strap

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• Verified Watch Owner Reviews (24 reviews)
SKU: SI-524

Watch Brand: Sinn

Sinn North America

Pilot's watch with sporty red seconds hand
• Watch diameter (mm): 38.5
• Watch height (mm): 11.0
• Lug width (mm): 20
• Lug to lug (mm): 45.5
• Weight - head only (grams): 65
• Water resistance: 200 meters
• Case back: Transparent
• Case finish: Satinized
• Case metal: Stainless steel
• Dial color: Black
• Front crystal: Sapphire
• Calibre: SW200-1
• 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: $1,340.00
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 to US, Canada, Puerto Rico, Guam and APO/FPO/DPO locations from NC using these shipping methods

Sinn 556 I RS on Strap
Sinn 556 I RS on Strap

(Click Image to Enlarge)
Product Details

If the new Sinn 556 I RS (red seconds) looks familiar, you're not mistaken.  This watch is now a general release by Sinn, but for years was a WatchBuys special edition.

Our special edition was such a hit that Sinn decided to expand production and add the watch to its worldwide collection.

More Attitude

The Sinn 556 I RS has all of the great features of the bestselling Sinn 556 I, but our clients say the red seconds hand offers "a bit more attitude."

The red seconds hand gives the watch a sporty look and feel, while still providing stark contrast against the inky black dial.

The Sinn 556 Series offers a great mix of performance, durability and classic Sinn design.  For these reasons, they are among Sinn's bestselling watches of all time.

This version of the Sinn 556 RS is marked "I" for Indices only. 

Important features of this watch include:

  • Case made of satinized stainless steel
  • Sapphire crystal glass on both sides
  • Water resistant to 200 meters
  • Date display at 3
  • SuperLuminova on the hands and hours (glows green)
  • Inky black dial
  • Double antireflective coating
  • Premium Grade (highest) movement

This watch is fitted with a Sinn black calf leather vintage style strap with red stitching.

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 (24 reviews)

Sinn 556 I RS on Strap

"Sinn 556 I RS on Strap"

Verified Watch Owner Comments: This is my third Sinn purchase from WatchBuys. Couldn't be happier with my watch. Will definitely come back for more.



Verified Watch Owner Comments: I have been keeping an eye on this watch for about a year now. I finally pulled the trigger close to a month ago. I have worn it every day since my purchase. It met all my expectations.

The watch has a very nice weight to it and I've been really happy with the movement. It was well worth it in my opinion.

Watch Buys customer service was awesome. They called me to verify the order before shipping. Asked a few questions to make sure I had the right size band and then emailed me the shipping info. Overall, great experience all around!

Great everyday watch

"Great everyday watch"

Verified Watch Owner Comments: Comfortable, balanced on the wrist and keeps time. i have a 7.5 inch wrist and the 556 fits perfectly.

I like the textile olive band best for comfort, water use (shower, swimming) and color matching with the white indicators, red second hand and black face. The face and date indicator are easy to read in sunlight, indoors and low light environments.

The Watchbuys people were easy to work with, knowledgeable over the phone and shipped quickly. Am looking forward to my next Watchbuys purchase!

Classic Piece

"Classic Piece"

Verified Watch Owner Comments: Anniversary gift for the wife, who loves it. Great design and keeping COSC-like time on the wrist.

Thanks to Watchbuys for suggesting the short strap option when I mentioned it was for her. The fit was much better and I wasn't aware of the option when I ordered.

Sinn556i RS Watch

"Sinn556i RS Watch"

Verified Watch Owner Comments: Love this watch - great customer service to help me get the correct strap size for my wrist

Sinn 556

"Sinn 556"

Verified Watch Owner Comments: My third type of this model. Comfortable size, great fit and finish.

Excellent service from WatchBuys with personal phone call after order placed.

556 ir

"556 ir"

Verified Watch Owner Comments: My 2nd Sinn purchased from watchbuys. Quick shipping once again. This watch as well as the 104 are beautiful pieces. Both are running about 6 seconds fast on the Sellita movement.

Buy With Confidence

"Buy With Confidence"

Verified Watch Owner Comments: Prior to purchasing my 556 I RS, I called and read reviews. Finally, I took the leap and I was not disappointed. You can make a purchase from Watchbuys with confidence. The time you have to commit to a timepiece is enough time to make sure you love it.

If you're a skeptic like me, they do good business. I am pleased with my purchase and have total peace of mind.

Sinn 556i

"Sinn 556i"

Verified Watch Owner Comments: Great watch and great company. I ordered my Sinn 556i-rs, a few hours later a representative called to verify my order. The watch arrived 2 days later. I couldn't be happier. Watch is averaging-1 spd.

Another great Buy

"Another great Buy"

Verified Watch Owner Comments: Another great purchase from WatchBuys. Couldn’t be happier.

Sinn 556 I RS

"Sinn 556 I RS"

Verified Watch Owner Comments: This is a very charming watch. Stylish and versatile. Wearing comfort is excellent. The bold white minute markers are highly legible—like reading an instrument in an airplane. Timekeeping is excellent at +2 sec/ day.

This is my third Sinn purchase from Watchbuys and the customer service has always been first-rate.

Sinn 556i RS on leather strap

"Sinn 556i RS on leather strap"

Verified Watch Owner Comments: Love at first sight! This is totally an awesome timepiece. A no nonsense timepiece. Super clean dial. The contrasting black dial on white markers makes it very legible (plus AR coating on both sides).

The red seconds hands adds character, It has kept time perfectly - almost comparable to a chronometer. The leather strap took ~1-week to break in, as expected.

Finally, services from Watchbuys was super classy! I received a phone call on the day of purchase, and the item was delivered next day. Overall, I give this a 5-star.

Absolutely in love

"Absolutely in love"

Verified Watch Owner Comments: Very satisfied and content with my new watch. All of the watchbuys team that i interacted with were stellar. Trey was very friendly knowledgeable and helpful when confirming order details over the phone and via email. Daniel was very patient with me through the delivery process and helped leave me feeling taken care of and appreciated as a customer and fellow watch fan.

Fast shipping, friendly service, and a product that delivers. My new piece is keeping time well within the advertised margin and hasn’t left my wrist since the day I received it. Thanks again watchbuys!

Fantastic finishing

"Fantastic finishing"

Verified Watch Owner Comments: When I opened the box, I hesitated whether I wanted to keep it. When wrapped in plastic, the watch looks so plain Jane. The moment I peeled off the plastic and put it on wrist, I immediately felt in love with it.

Sitting next to my Grand Seiko spring drive, it looks just as finished (albeit a different kind of finishing). It's also extremely comfortable, versatile, and legible. 10/10 recommended.

556i RS

"556i RS"

Verified Watch Owner Comments: Been seeking out a German brand and was happy to have selected Sinn and it's distributor Watch Buys. Ordering online was easy and received call to confirm my order and wrist size as I was getting on leather strap.

Loving the 556I and highly recommend the brand and purchasing from Watch Buys.

556 I RS

"556 I RS"

Verified Watch Owner Comments: I bought the 556 to be an everyday watch. Special ordered on a rubber strap and it was delivered on time.

I work at night and the dial is very legible with even small amounts of light. I Iike the red seconds hand but it it not very visible in low light conditons, FYI Sinn makes a quality product, I’m happy with my watch.

Excellent Watch, Great Service

"Excellent Watch, Great Service"

Verified Watch Owner Comments: This is the second Sinn I've bought from Watchbuys (I bought a blue-dial 104 last year), and I've had my eye on this particular 556 with the red second hand for close to a year and was finally able to obtain it .

Watch came in perfect shape the next day after ordering. A well-made all-around watch with a very clean dial. The black/red strap is a perfect look, and for me it's pretty comfortable, though I do want to get the H-link bracelet that fits this at some point. Overall, love this beauty of a watch.

Watchbuys is definitely the place to go if you're looking for a new Sinn.

Sinn 556 I RS

"Sinn 556 I RS"

Verified Watch Owner Comments: I purchased this watch without seeing how it would fit first on my wrist. I liked how it fit. In fact I'm wearing the watch now. I ordered the metal bracelet too, but I have not installed it because I'm still loving how well the black with red trim strap looks on the watch. I will be ordering the 556 A RS on a bracelet next month.

Sinn 556

"Sinn 556"

Verified Watch Owner Comments: Very pleased with my experience buying my Sinn 556 through watch buys. They gave me a call promptly after placing my order to confirm every detail which was reassuring since its not every day that I order a watch online.

All in all a very positive experience. Watch came sooner than expected and is better than expected. The watch is flawless and im completely satisfied with it!

Great watch, even better customer service

"Great watch, even better customer service"

Verified Watch Owner Comments: I have had my eye on this watch for a while and it exceeded all expectations.

Watchbuys was great, the called to confirm the order, explained the return process, and my order arrived next day. I definitely will be buying from them again in the future.

Sinn 556I

"Sinn 556I"

Verified Watch Owner Comments: Superior quality and functionality.

Excellent Watch

"Excellent Watch"

Verified Watch Owner Comments: Quick, fast shipping from WatchBuys. The watch came packages with the Sinn packaging and an authorized dealer tag with dealer information.

I am very happy with the quality of the watch. I debated for a while on whether to get the model with the red second hand, but I am very glad I got the RS version, it looks amazing. If you know you want a new Sinn, this is the place to buy it.

SInn 556 I RS

"SInn 556 I RS"

Verified Watch Owner Comments: Very simple and clean looking watch. I bought mine with the black leather strap. The strap is sturdy and well made, just wish they painted the side of the strap. I also Wish it had the ETA movement instead of the sellita movement.

So far pretty good

"So far pretty good"

Verified Watch Owner Comments: So far I’ve really enjoyed this watch, the band itself comes quite stiff and isn’t my favorite but I love the watch itself. The clear case back is definently a nice addition to the watch. The only thing I would want different is a different band but the watch in itself is great.