Sinn 903 Column Wheel St BE on Bracelet

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• Verified Owner Reviews (5 reviews)
SKU: SI-359

Watch Brand: Sinn

Sinn North America

Automatic winding column wheel chronograph with deep blue dial
• Watch diameter (mm): 41.0
• Watch height (mm): 14.5
• Lug width (mm): 22
• Lug to lug (mm): 48.5
• Weight - head only (grams): 88
• Water resistance: 100 meters
• Case back: Transparent
• Case finish: Polished
• Case metal: Stainless steel
• Dial color: Blue
• Front crystal: Sapphire
• Movement: Automatic mechanical
• Manufacturer's limited warranty: 2 years
• Strap or bracelet: Bracelet
• Warranty service: RGM or Sinn

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WatchBuys Direct Price: $3,940.00
Availability: Temporarily Sold Out

Sinn 903 Column Wheel St BE on Bracelet
Sinn 903 Column Wheel St BE on Bracelet

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Sinn 903 Column Wheel St BE on Bracelet
Sinn 903 Column Wheel St BE on Bracelet
Sinn 903 Column Wheel St BE on Bracelet
Sinn 903 Column Wheel St BE on Bracelet
Product Details

The Sinn 903 Series has a long and rich heritage with close ties to the original Breitling watch company.  When Helmut Sinn developed the Sinn 903 Series he created not only a classic for that time but one that endures today.

This watch now features a Manufacture La Joux-Perret 8000 column wheel chronograph movement.

The Sinn 903 St BE pays homage to Helmut Sinn's original creation by featuring a stunning dark blue aviator's dial with luminous ivory coated hands and indices.

The color of the SuperLuminova that Sinn chose for this watch closely mimics the color of luminous materials used in the 1960's and early 1970's and when contrasted with the blue dial create a vivid look.

Much of the design work for this watch came from direct feedback from Sinn collectors and enthusiasts around the world asking Sinn to produce a 903 series true to its roots.

The Sinn 903 St BE was designed from the ground up to meet the needs of professional aviators. Modified register placement aids in performance, while internal slide rule ring provides additional data. This rotating inner ring with logarithmic scale divisions is set by a crown at 10.

Automatic winding mechanical chronograph movement with power reserve of 42 hours.  Functions include hours, minutes, subsidiary seconds, date and complete chronograph functions.

Polished steel case with sapphire crystal front and back. Open back reveals the nicely finished movement with Sinn rotor. Other features include offset date at 4:30 and water resistance to 100 meters.

This watch is low pressure resistant and features a screw down crown.  A polished Sinn fine link stainless steel bracelet completes the look.

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.

DIN 8330 / 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) and DIN 8330 were originally 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 DIN 8330 / TESTAF Series


Watch Reviews From Verified WatchBuys Buyers
100% • Verified Owner Reviews100% • Verified Owner Reviews (5 reviews)

Beautiful Watch - Even Better in Person

"Beautiful Watch - Even Better in Person"

Verified Owner Comments: My husband researched many watches before landing on the Sinn 903. We received it very quickly from WatchBuys, they were very helpful with answers to our questions too.

When we received the watch, my husband was extremely happy - the details and craftmanship of this watch are very high quality. We found the dial to be very dark blue though - it looks black in most lights unless in direct sunlight or against something that is true black.

My husband likes that feature of the dial. We liked this watch so much we went back and bought another Sinn.

Very positive!

"Very positive!"

Verified Owner Comments: Quick shipping beautiful watch. Perfect buying experience!

Great Watch! I’d Recommend Over Similar Sized Navitimer

"Great Watch! I’d Recommend Over Similar Sized Navitimer"

Verified Owner Comments: I can’t say enough about this beautiful watch! I bought it to my supplant my Breitling Navitimer GMT as a "daily wear” watch. I love my Breitling. I’ve owned it over 2 years but HATE getting it dinged, wet (no screw down crown) or sweaty (leather strap)... I don’t have those worries with my 903! Sinn’s quality appears TO BE better and more "solid” than my Breitling which is shocking. The Sinn’s smaller diameter wears better with long sleeves and sport coats than my larger Breitling, which is 48mm in diameter. Bottom line: This is a GREAT watch that I love equally as well as my Breitling. It ‘s a much better value (half the price of my Breitling), just as beautiful yet appears to be better quality (time will tell). I won’t hesitate recommending the Sinn 903 over a Breitling of similar size... it’s a GREAT VALUE and an even more stunning watch! BTW, I never heard of Sinn until I researched "more durable alternatives to a Breitling Navitimer.” After reading the story of Breitling’s ba... - more details



Verified Owner Comments: Absolutely, hands down, my favorite watch in his collection! Classy! Sexy! Worth every penny! Sinn is Quality! Love Love Love!

Stunning Classic Style and Quality

"Stunning Classic Style and Quality"

Verified Owner Comments: This is the much-famed non-homage legal clone of the Brietling Navitimer. The design of this watch is classic and timeless, and exudes high quality. Sinn craftsmanship is amazing for the price, and here you get a Navitimer which is much cheaper than current offerings from Breitling but every bit its equal or even its better. It boasts innovations on the Breitling model such as screw-down crown, 100m water resistance, and extra crown for turning the inner rotating bezel. The dark blue dial an faux-aged lume make the watch look like a vintage beauty with modern build quality and parts. It's not a small watch by any means, but wears well on my skinny (6.25 inch) wrist. The inner bezel helps it wear small. It's just one of those watches that almost anyone can pull off. Love looking at it and using it. My only complaint is that the crowns are a bit difficult to turn, often requiring me to pinch them to get a good grip. The chrono pushers also feel a little stiff, but the action is good ... - more details