Great great info-and 7TF yup I found a number of double dies already and been schooled by the guys here but it's gonna still take some time and more looking/experience to get it down-have not found a true double die yet have only found a nice
Cud,a bunch of strike throughs(from grease I think I've been told),and my best find has been '72 ike type2 that I've had for over 30 years and never knew it-I've looked through a heck of a lot of my coins that I've loosely collected over the years and those are the only errors I've found so far and it's been thousands of coins-sure I've missed some as I'm learning but they truly are rare!