Posted By:
barrysloateBobby- at 11:43 PM you addressed a post to me. I haven't even participated on this part of the thread, but I will.
In the 1980's there was famous case where one of the monthly price guides (I've already forgotten the name) was successfully sued for stealing a checklist from a Beckett publication. Beckett won the case because the one cited, I believe for the 1969 Topps decals, had an obvious typographical error, and the same error showed up in the monthly guide.
That said, the W600's have been checklisted many times before, and while Jerry is an advanced collector who has undoubtedly found a few new additions, I'm not sure why this is big issue. It's true that one should compile a checklist from primary sources, but that would entail having possession or getting a scan of every card in the set. That would be totally impractical. The second best method would be to get permission to use the checklist put together by the collector who knows the set better than anyone. Arguably, that would be Jerry Spillman.