I don't know much of anything about the series. I have the Cherrypicker's Guide for varieties, but cannot find these in there. A couple of these, I'm not sure if they're even varieties. Calling the experts! @howards @Paddy54 1. 1867 with an obvious RPD. But what variety, exactly? 2. 1869 with a Doubled Die obverse? Surely that's not just machine doubling on the motto... also maybe a RPD, but I dunno. 3. 1873 Open 3 with an RPD... maybe.
This is the only book I could find about Shield Nickels. A Guide Book of Shield And Liberty Head Nickels: Complete Source For History, Grading, and Prices (The Official Red Book) I'm surprised Flynn doesn't have a reference book out. He covers many other older issues.
