Beautiful and very collectable Bulgari "Save the Children" ring
Sterling silver
Szie 6 also marked 51 which I assume is a European size.
Good used condition does show some slight wear: see photos

In 2009, Bulgari embarked on a partnership with Save the Children towards a bold dream, to empower millions of children to build a better future through education. Since the beginning of this partnership, more than 2 million children have been helped to make their dreams come true.
Now more than ever we need to help disadvantaged children all around the world.