Monica Vinader Gold Vemiel Riva Diamond Cuff - size 7.5" - It is 21cm all the way round including the gap. It is hinged so you can get it on and off. weight 12gramms - RRP £350. See all photos for the hallmarks and VG in a rectangle plus some other marks. I dont have a very good eyeglass so cant see all the marks clearly plus I am waiting for eye surgery in a couple weeks.
I do not have the original box but I have put it in a nice white presentation box with the blue original cushion.