I have a Silver ring, it is marked S925, on one side and there is a 'R' stamped on the other, can anyone figure out what the 'R' means, I've been all over trying to find it. I hope the photos I've attached can help. Cheers http://i40.tinypic.com/6zca6a.jpg http://i42.tinypic.com/ei37g4.jpg http://i4...