thread on the World Coins forum. I can read characters, but that's about it, so it's been educational digging through the Hartill books and starting to teach myself how to attribute these. Most are too new for this board, but I though these 3 made a nice set. L: Hui Zong, Sheng Song Yuan Bao 聖宋元寶, Seal Script, 1101-1106 Hartill 16.354-60? C: Hui Zong, Zheng He Tong Bao 政和通寶, Seal Script, 1111-1117 Hartill 16.437? R: Hui Zong, Zheng He Tong Bao 政和通寶, Clerical Script, 1111-1117 Hartill 16.449? Not sure why the left one is so much lighter in color--I don't think it's one of the iron ones. It's hard to pinpoint the exact variety from subtle differences in the character strokes. I think most of these were picked out of 99 cent bins of cash coins about 25 years ago, before I knew much of anything about Asian coins. Please post any Song Dynasty coins if you like!