The most famous female spy in the world, Margaretha Gertrud Zelle, was actually just "A living letter box".
In history there are many more significant female spies. This ring found its way to Finland with a
German SS-soldier, but has it ever been worn by the legendary Mata Hari? Engraved letters
"MZ" can be seen on the surface of this beautiful piece of art manufactured in the early 1900`s.