Hello, I'm new here too! This forum is a great resource.
I have always called this the Tree of Life, it's actually on of my favorite pins. I've always wanted one in gold.
However, here's a link to one on ebay, you can see where the hallmark should be. I do not know if they marked everything or if there are reproductions out there.
http://cgi.ebay.com/Authentic-Mikimo...QQcmdZViewItem