Hi there Brenton, I was so excited to find the information myself when I was on the quest. I'm a hunter just like you. It's a huge learning curve in the field of glass, that's why I joined the glass board. If you ask your questions directly to the oracles who live behind the scenes here I bet they will know the answers. I still have clunky training wheels on. I'm not the author of the ozcrowncrystal, though I'm very proud to say I took the photo of the harbour bridge plate. I'd love to know who is the author too. It's lovely someone has made a site for our glass. There are some great books about by Ken Arnold that will help you. Cheers Dianne.