Price: $1800 firm + USPS priority shipping (It sells for $3800 new, if you can find one) More photos: [https://imgur.com/a/MWoG5DI](https://imgur.com/a/MWoG5DI) Timestamp: [https://imgur.com/PVFc1ul](https://imgur.com/PVFc1ul) A rare Sinn U1 SB and the B stands for blue dial that's the best of both worlds. Blue when you want it (in the light) and black when trying to tell the time. It's a really nice touch that makes it unique and adds a touch of class to the beast of a piece. It has a unique DLC finish that makes it super slick to the touch and comfy. The watch is made from fully tegimented steel that is used for German submarines and five times tougher, (1200 on the Vickers scale) than a normal steel watch. To attest to Sinn's crazy engineering it has a 1000m depth rating and does not need a helium escape valve because they build it so well, it never gets in the case. Don't be intimidated by the 44mm case, as one youtuber put it, it wears much smaller. And the great thing about this is how stealthy it is, I can wear it in tough areas and nobody will want to mug me and if they do, I can use it as a weapon. I bought it off the exchange a few weeks ago and am only letting this go to chase my grail Omega. It keeps wonderful time, much better than my SMP. I think I'm the third owner, the previous owner only had it for a short time. It's sized to a 7 inch wrist and has the extra links, along with certification card, manual, loctite, hex wrenches (for the bracelet) and the Sinn branded tool. I'll throw in a nice NATO style strap as well. ONLY possible trade if for a first gen (2500)  42mm Planet Ocean. Payment via PayPal, Venmo or Zelle Watch location: VA - USA Happy to Facetime or Whatsapp to video verify Condition is 8.5/10. See the photos for more details. I took the photos outside with a super nice camera and lens so if you see any imperfections that's because of the conditions. The only markings are on the back of the lugs from swapping straps. \*Edited the timestamp link