I have loved the Sinn brand since I first set eyes on one in 2014. I managed to buy an 857 UTC on rubber strap and then updated to a steel H link later. The U1 has been on my radar since this time too. Though the smaller U50 might get the nod over that one now.
I have loved many of the special series watches they produce and fell in love with the 836 which came out a few years ago with its stylish black dial and clear numerals on the black leather strap with red stitching, it was definitely a grail peice for me. However as time has gone by my taste for large over size watches has decreased and while the 836 is not massive I just couldn't bring myself to buy it because of its size on my wrist. Untill I discovered that Sinn had made a very similar looking watch in the shape of the smaller 556.
Early this year I decided to treat my self to a new Sinn as I had come through a difficult couple of years with health issues and a big change in my life style/ job situation. So I pulled the trigger on the 556A RS.
It finally arrived last week and it's absolutely perfect. I'm so glad I held out for the smaller 556 and not the 836. As I know it will get more wrist time.