Interesting (well, that's quite dependent on what your definition of "interesting" actually is, but I digress) Epilogue:
Someone cue Chicago's "I've Been Searching So Long"...
I've been searching forever to track down another Clemente that looks similar to the star subject of this thread and guess what??
I finally freaking found one!!!!
Look what I ran across. The similarity here
(mine is on the left) is striking. The anomaly going from the side of his face and neck, passing over his bat and continuing right into the white border. Pretty cool, indeed...
1969clementephantomstainMINEvsANOTHERcomp.jpg
By request, the owner shone a flashlight on his to see if there was anything atop the gloss, and then opined it's not a gum stain, "It appears to be as if the print rollers created a smudge."
I can now finally put this one to bed. Be sure to tell your children to never give up on their dreams. "If you continue to put the effort into something, you'll reach your goals in the end."
(But also tell them not to have stupid goals, like finding a Clemente smudge. Aim higher.)