A silver gilt and bright blue enamel slide charm from Vienna, Austria. The front has UN VERGESSLICHE TAGE written in German which I believe translates to An Unforgettable Day, It also has a tiny four leaf clover in the bottom right hand (as you look at it) corner. It is marked on every page and the back page has a stamp of Diana's head. It is 900 silver with a gold wash over with only slight loss of gold. It measures approx. 2.4x1.5cm overall and weighs 5.4g. A very rare item in excellent condition for its age.