I purchased this new from WatchBuys (Sinn’s US distributor) in July 2006. It was regularly serviced, most recently in August 2021. Shortly after that I put all the links back into the bracelet and haven’t worn it since. This watch saw 15 years of hard wear, but you need to look really close to see any signs of it. That’s the beauty of the tegimented steel + sapphire crystal combination – the watch is practically bulletproof.  Current price for a new one is $2,840 when they’re in stock. Yours shipped for $1,650. I prefer Zelle, but since this is my first sale here it’s understandable if you want to use PayPal Goods and Services; I’ll pay that fee. ***From the manufacturer:*** Sinn 856 UTC Fully Tegimented on H-Link Bracelet SKU: SI-085 Automatic winding with second time zone • Watch diameter (mm): 40.0 • Watch height (mm): 11.0 • Lug width (mm): 20 • Lug to lug (mm): 47.5 • Weight - head only (grams): 70 • Water resistance: 200 meters • Case finish: Matte • Case metal: Tegimented hardened steel • Case back: Solid • Tegimented: Case and bezel • Dial color: Black • Front crystal: Sapphire • Inert gas: Filled • Copper sulphate: Capsule • Movement: Automatic mechanical • Calibre: SW330-1 • Antimagnetic: 80,000 A/m • Strap or bracelet: Bracelet • Bracelet Tegimented: Yes • Bracelet finish: Matte • Quick adjust buckle: No ***Product Details:*** The Sinn 856 has become a favorite for those seeking a dual time zone watch. Sinn's inspiration for the design of this watch is the historic Sinn NaBo clocks, long manufactured for use in cockpits as a navigational tool.  Even today Sinn continues to produce these clocks which are used in both civilian and military aircraft, as well as specialty cars. This watch features "Tegiment" technology.  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 layer has a hardness of 1,200 Vickers which is up to five times harder than standard steel. The Tegiment layer 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 even further improved by the Tegiment hardening process. Next, this case offers magnetic field protection of up to 80,000 A/m, among the highest for any mechanical watch. The case back is nickel free offering protection to those with allergic reactions to this metal. And for those that don't encounter magnetic fields on a regular basis, it's just a great watch to wear every day. The case features a copper sulphate capsule which reacts with moisture to diffuse and absorb humidity in the watch. A small yellow hand indicates the second time zone on a small 24-hour scale. Sand-blasted stainless steel case with solid back. Dial is matte black with Arabic numerals and offset date display at 4. The design and layout of this watch make it extremely easy to read in virtually all light conditions. Sapphire crystal with luminous hands and hour markers. Watch is water resistant to 20 ATM.  Steel Tegimented bracelet. Other features include Sinn's Dehumidifcation Technology which uses inert gas to reduce humidity and to prevent the dial from fogging.