I stumbled across this web site: http://www.briansvarietycoins.com/ It has so many varieties and photographic reference for each. It appears to have more varieties and pictures than Lincolncentresource & Coppercoins combined. I obviously cannot attest to the validity of the web site owner's attributions , but I have found some pictures of varieties that more closely match cents I am finding , than any other site so far. Coneca doesn't even have as much photographic reference.
That is Brian Ribar's site. He is the official attributor of US Nickel Varieties for John Wexler and has co-authored several books with him. His is a founding member of NCADD and has held several prominent positions in that organization. He knows his stuff and his website can serve as a good reference. Keep in mind his variety attributions for the most part are based on Wexler's files with some cross reference to CONECA.