Just noticed that my U1 has a mark or scratch on crystal at 700 position, very small, definitely not on the outside, cannot feel it and will not wipe off. It seems to be just floating inside the glass, if that makes any sense. I took pics but they don't convey the mark. It looks like a piece of cut glass, very small, but noticeable. Can this be an AR coating issue or could it be on the inside of the crystal?
I recently had this U1 serviced by RGM (new crown/stem and regulated) not that this had anything to do with it.
Maybe taking it to a jeweler to have a look with their optics would tell me what exactly it is? Watch was bought new from watchbuys this summer. If it is in fact on inside, would it be a warranty issue??