Just like the Clemente, it's impossible to know whether the supposed gunk on this card is gum/wax residue or a 'printer smudge,' but it's something in the same vein...
Zoilo-Versalles.jpg
To 'connect' to the Clemente, it would be better if the anomaly appeared on the left side, but it's also possible that whatever caused the Roberto smudge also separately caused this Zoilo smudge (if it is, in fact, a smudge, and not gum/wax) at a different (non-connected) time?