Hmmm... lacquer, you say. That may explain why the lines look indented, and why the veins look filled, and shine differently.
I wonder what happened between minting and getting packaged in the set. Does
PMD mean post-mint or post-minting ? If it's the latter then this coin has
PMD.
Since the lacquer was done before leaving the Mint, I think I'll leave it as it is, and I'll call it "at-mint" damage.