Yep, I overtyped when I said there was a gatemark on the ERIE piece ( although I'll go back and look, believe it does have a side grind mark ). I was actually more concerned that the ERIE had signs of heat damage ( wire bail deformed and reddish metal tinge which would negatively affect its collector appeal, but figure that its age and overall identification as an early ERIE is more relative.
Thanks for the additional info on the letter X, there has been so much info to research on these, that was a new tidbit. I have not sold any CI on line, but if I do, I want to be able to reliably portray the item! Appreciate 2nd opinions from those who know!