I have an awesome, minimally used, Sinn U50 Hydro for sale. This was a replacement sent to me by Sinn after a watch that I sent in to them for servicing got lost on the way back to me. I tried to bond with it, but it is just a little bigger than what I am gravitating to these days (I'm into 36 to 38mm watches lately). Anyway, the only signs that it has been worn are scratches on the hasp. Otherwise it is unmarked. I bought a new and uncut strap from Sinn to go with it. I am happy to send the original strap as well, but it has been cut to fit a 6.25" wrist. It will come with all of the original paperwork and boxes that Sinn sent with it. Works perfectly and keeps great time. If you have never experienced a hydro watch they are great to own. Aside from unbelievable depth ratings (5,000 feet in this case) they are viewable from very shallow angles above water and are very visible under water as well (they look like a normal dive watch under water. Air filled - i.e., normal - dive watches can only be viewed straight on under water. They look like a mirror from an angle). So it is both practical and extremely cool. More from Sinn: [https://www.sinn.de/en/en-sinn/area-of-application/diving-watch/u50-hydro.html](https://www.sinn.de/en/en-sinn/area-of-application/diving-watch/u50-hydro.html) $2200 shipped CONUS. Face to face transactions in Portland OR are welcomed.