Coin information is available with references like Krause Mishler coin catalog and others, but you will be surprised that those are not complete and do not contain all answer to your questions. It is good to be a member of a group, who will help you. Group members who are older has more tendency to share info than the younger ones. So my advice to all new collectors with a lot of questions is to first join coin collectors clubs. Many collectors are very friendly.. thanks to everybody who always help me..