We'll see...WHAT? What brought your attention...?
It looks like staining/environmental toning, not zinc. But there does appear to be some minor plating defects below the date and lower rim, as well as some spots/blisters in the right field
Sorry, this is just environmental damage.
Environmental contamination.... Post Mint..... No numismatic premium. Cheers, RickO
Post mint damage
what ricko said