Sinn U1 on Strap

SKU: SI-120

Average Watch Ratings: 100% (33 reviews)

Automatic winding mechanical diver's watch - more details
Case diameter (mm): 44.0
Case thickness (mm): 14.3
Case back: Solid
Case metal: Submarine steel
Dial color: Black
Tegimented: Bezel only
Winding: Automatic
Manufacturer's limited warranty: 2 years

Earn 4080 WatchPoint Rewards on this purchase

WatchBuys Direct Price: $2,040.00

Availability: In Stock - Ships Immediately
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Sinn U1 on Strap
Sinn U1 on Strap
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Product Details 

The technology and design elements used to create the Sinn U1 go far beyond standards used at most watch companies.

The U1 case is made from the same steel that is also used in the construction of the outer hull of submarines. The steel was procured by Sinn from a steel supplier to Emden GmbH, one of Germanys North Sea shipbuilding yards who construct submarines from the very same steel. 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.

Because of the special steel used from the submarine steel manufacturer, the case resists the effects of exposure to salt water and salt water environments.

The uni-directional ratchet operated rotating bezel is also milled from this submarine steel and is Tegimented. The indices are machined directly into the bezel without the use of bezel inserts, which can corrode or come loose at deep depths. The international testing lab of Germanischen Lloyd has tested the U1, and determined that the watch can be certified as water resistant to 1,000 meters. This same firm tests submarines for their ability to withstand the effects of underwater use.

Matte black dial with date at 3, Super Luminova on hands and markers, and striking red seconds hand complete the design. Other features include sapphire crystal with anti-reflective coating, and silicone rubber strap with double push deployant buckle and fliplock safety clasp.

Watch Reviews

Average Watch Ratings: 100% (33 reviews)

>> Read all watch reviews [33]  |  Write your own watch review


Rate this watch:

"Great Watch"

Posted by: Matt K.

Comments about this watch: I wear this watch everywhere. To the pool, to bed, to work. Seems very durable and reliable. Mine is also keeping excellent time at +3 seconds a day. Highly recommend this watch. Also the service was top notch from WatchBuys! will definitely buy from them again.

"Amazing Watch!!!"

Posted by: Mike M

Comments about this watch: I have wanted one of these for several years. I currently own other high end watches such as an Omega which I love, but I am hard on my watches and don't believe in leaving watches in a safe. I wear them hard and use them hard. I scuba dive and spend a lot of times in the woods. I read many reviews and watched many YouTube videos showing the lasting power for the U1 and decided it was the one for me. I have had mine a couple weeks now and it's already been to the Bahamas to go diving and hiked t... - more details

"Sinn U1"

Posted by: Kendall S.

Comments about this watch: I'm not into tacky oversized monstrosities and find that the thick bezelled U1 wears more like a 42mm which I find perfect! My next "good" watch was supposed to be a Speedmaster Pro but I hear the Sinn 358 calling my name....

"The U1 is Awesome!"

Posted by: James

Comments about this watch: Love the size and feel of this watch. Its hefty, but not overbearing. Never thought a rubber strap could wear so well and feel so solid. Easy to read dial. All in all a great watch, and amazingly accurate (like +2 sec/day). I definitely recommend this for anyone on the fence, you will be pleasantly surprised.

"Amazing Watch"

Posted by: Ted F

Comments about this watch: Just love this watch. Couldn't be more pleased with the purchase and the purchase experience through the team at WatchBuys.

"Digging the U1"

Posted by: Ted

Comments about this watch: Picked up the U1 a couple of months ago after gawking at photos online. I'm drawn to dive watches, and this watch is really fantastic. Solid case, rubber band is perfect. Enjoying wearing this unique piece, and equally impressed with the purchase experience and communication from WatchBuys. These guys are great.

"Awesome Timepiece!"

Posted by: Douglas Dutter

Comments about this watch: This SINN Watch is Awesome! I love German engineering and am delighted with this good looking rugged timepiece. The Sinn U1 watch combines beauty and boldness that's rare in todays watch world.

"U! - Keeper!"

Posted by: Matthew

Comments about this watch: Great everyday watch! Love everything about it. Perfect size, height, look-wears well w/ a variety of straps. Can't go wrong.

"Utilitarian monster"

Posted by: David Snow

Comments about this watch: The one word I keep coming back to is 'solid'. It's heavy, yes, but the proportions feel balanced and functional - it's not large for being large's sake. The crown turns smoothly with a satisfying amount of resistance and screws down firmly. There's a bit of play with the bezel - about 1/2 of a second's arc - if you mess with it, but it settles right into alignment the moment you stop playing with it, The 'clicks' as it rotates are a bit rough, and sound more like a muted thud rather than a shar... - more details

"U1 is now my favorite watch"

Posted by: Michael

Comments about this watch: The photos don't do it justice. The U1 is so comfortable I have to look to see if it is still on my wrist. By far it has replaced my Breitling watches and my Submariner as my favorite watch.

"Absolutely Love This Watch!!"

Posted by: Kirk

Comments about this watch: This watch is everything everyone says it is and more! I just love the way it looks on my wrist with a mesh bracelet, I get so many compliments on it. Tough as nails, still looks like new after 3 years.

"Movie stunt double - the watch survives!"

Posted by: Paul Lazenby

Comments about this watch: On a recent movie I was stunt-doubling for a famous actor, and had to grab another performer and run him through a wall.

This actor saw that my watch looked nothing like his Sinn U1, so he gave me his, saying "I'll give you $100 if you can break that watch".

Afterward, I was badly cut and the other man had a dislocated shoulder, but the Sinn U1 was unharmed. Nice to know that someone is still putting pride and effort into their products.

"Highly recommended Sinn diver!"

Posted by: Jerry Wang

Comments about this watch: The U1 is a tough watch that inspires confidence. The look of the watch is no-nonsense and it just feels purpose built in its heft and appearance. There's also a real high quality to it from the amazing silicone rubber strap and deployant to the great finish of the case, dial and hands. I own a lot of divers from various brands but there is just something about the U1 that is extremely appealing to me both aesthetically and functionally that not even some of my higher end divers can match. I've ... - more details

"Perfect combate watch!"

Posted by: G. Minze

Comments about this watch: Absolutely the toughest watch I have ever owned. accurate, strong and water proof. I rate it along with Rolex, Breitling, and Tag...consider it tougher than the aforementioned watches. My only complaint is the cost of the steel band, I don't think it is over priced just an added cost. I also purchased the water proof leather band made as a replacement for this fine watch......AAA for the U1 I own other fine watches but this is the most wearable due to its tough as nails construction. I used it i... - more details

"Great watch for the money!!!"

Posted by: Dickson L

Comments about this watch: I've received lots of compliments on this watch. Got both the rubber strap and SS bracelet. Rubber strap is very comfortable. You won't be afraid to wear this everyday! WatchBuys service is top notch even to Canadians!


Posted by: Tim A

Comments about this watch: No matter what I am doing, I never worry about my Sinn U1. It can take dropping, banging, being soaked in oil and still comes up without missing a beat. I have owned three other Sinns and many Omegas. This watch is the most dependable and most unique that I have owned. Easily dollar for dollar the best watch I have ever owned.

"Sinn U1"

Posted by: John Wagner

Comments about this watch: I've been collecting watches for many years, especially divers and I have to say the Sinn U1 ranks up there with the best. Love the sub steel look and durability, the dial is unique from a distance and extremely legible. Movement is very accurate over the past several weeks gaining about 1 sec per day. Rubber strap is very comfortable and the 44mm case is comfortable due to the off set crown. All around great diver watch!

"Watch Saved My Life!"

Posted by: Oliver G.

Comments about this watch: I bought the Sinn U1 while in Singapore for a ship repair. I had never heard of the Sinn brand, but I was impressed with the build quality and the uniqueness of the watch. The thick rubber band saved me this last summer while shucking oysters! The knife slipped and went straight through the band, stopping at my wrist! I highly recommend the Sinn line to anyone. I also have a vintage Rolex Submariner Date and a new Rolex Explorer II, but I find the Sinn U1 to be the most unique and interesting of... - more details

"Awesome watch!"

Posted by: Floyd H.

Comments about this watch: There are a number of reasons I love this watch. 1. Build and quality is superb. I wanted a watch that can take any abuse in daily wear yet remaining comfortable on my wrist. The rubber band is super comfortable. In fact I wore it to sleep on a first day without noticing it's there. 2. Accurate and Reliable automatic movement. While wearing it I don't feel the "winding" experience like any other automatic movement. 3. Perfect size. I have a small wrist 6.5" yet 44mm (lug to lug) x 15mm (height) ... - more details


Posted by: Bob Breznay

Comments about this watch: I just received the U1 today.  All of the pics I've seen don't do the watch justice. I'm totally amazed, Tim, Rob and Matt are top notch. The transaction was as smooth as silk and delivery was right on time. WatchBuys and staff are a class act and will be hearing from me again.


Posted by: John L

Comments about this watch: I purchased my first U1 last year and stupidly flipped it. Purchased my second U1 yesterday and it is all I remember it was. A very solid, well made very comfortable German watch. With arguably the most unique watch face out there.

"Two years on my wrist"

Posted by: Rene Decquir

Comments about this watch: For once I bought an automatic watch that is easy to to set and is very accurate and indestructable. It is quite scratch resistant and the ruber band is still holding up.

"Shockingly awesome watch"

Posted by: Frank Gregory

Comments about this watch: Great solid watch with more technology than any other diver watch besides the Sinn U2. Although not a chronometer it runs like one. Very pleased.

"My U1"

Posted by: Mal

Comments about this watch: Received my new U-1 last week and it hasn't left my wrist. My Sea Dweller is at rest in my cabinet drawer.


Posted by: Jason R.

Comments about this watch: Just got my U1 today and I was blown away by how well thought and well made this watch is, I came in with high expectations but having never seen a U1 (or Sinn for that matter) in person it handily beat my expectations. great watch, great company. (other watches Rolex Subdate & Panerai 111)

"Great Watch."

Posted by: Ryan Miller

Comments about this watch: This watch looks awesome. Wears great. I've not taken it diving or put it though any hard core abuse,but it does keep GREAT time and just feels great to wear. I have 6 other watches and this one has not left my wrist in a while.

"Solid Watch"

Posted by: J. Steinberg

Comments about this watch: A rock solid timepeice and the workmanship is outstanding- A unique watch that I enjoy wearing everyday-


Posted by: travis bayliss

Comments about this watch: I have worn my U1 every day for 3 months that includes,salt water dives,moto-cross,golf,power tools and yard work and the watch has performed above and beyond the call.

"Love it !!"

Posted by: Owen Fischler

Comments about this watch: I have several watches. This one is by far one of the best. Especially when you consider the value for money. I highly recomend this watch!!!


Posted by: Cliff Geocos

Comments about this watch:

The U1 is a great looking watch that wears like a 40mm.
It`s very comfortable, even on my fairly small wrist.  I`ve had it for 3 days now and it`s only 3 seconds fast!  It's a great buy, and getting it from WatchBuys you can`t go wrong, they`re great too! Thank`s Matt!


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