How to tell vintage jewellery from new

Just wanted to show you all this blog article about telling your vintage jewellery from your new jewellery . I'm working on more detail for each of the 16 ways to tell your vintage piece from new . Hinges is already complete and on antiquesavenue blog and catches is on its way soon.
Do get in touch if you have anything to add to this list I would like to make it a comprehensive reference on vintage jewellery.
Thanks for you help
Anne