Wedding Band Markings: Understanding the 'Z' in a Square Hallmark

Question
I have a wedding band it's has lots of diamonds and as I was cleaning it I noticed a "Z" inside of a square. What does this mean? Who made this ring please help me I have searched the internet and have found no answers. Thanks a bunch

Answer
HI APRIL,

I JUST HAD A SIMILAR QUESTION EARLIER ABOUT THE SAME THING. ONLY THE LETTER IN THE SQUARE WAS AN 'H'. IT IS USUALLY THE HALLMARK FOR THE MFG. OF THE JEWELRY. IT IS IMPOSSIBLE TO KNOW ALL THE STAMPS AND HALLMARKS OF ALL THE THOUSANDS OF MFG. ALL OVER THE WORLD. THE ONLY WAY TO FIND OUT IS TO GO TO A VERY EXTENSIVEW LIBRARY AND LOOK THROUGH THE BOOKS OF HALMARKS TO FIND THIS ONE. THERE IS NO GAURANTEE THAT IT WILL BE THERE BUT THERE IS A GOOD CHANCE. GOOD LUCK

PETER