Looking To Build My Knowledge Of KHD

I tried searching on here for a topic that breaks down key dates mainly for the KHD series. I use variety vista in my searches to help me look for known errors on coins, but being newer to KHD ( I usually CRH cents) I wanted to try and get a list/info put together to help me learn and not miss something that could be a key date or something.

Any help is appreciated, but would love to hear from the community who has probably searched way more half dollars then myself.

Just to clarify; I'm interested in all half dollars but CRH only turns up the Kennedy series mainly. Have yet to find a half older then the 64 CRH.

So any more experienced hunter then me I welcome your advice and possibly we can get a collection of key dates, errors, ect.. to reference on this lovely website.

Thanks!