Hi coin folks, Is it just me or do you see a Denver Mint Mark On the Reverse of this 1967 US Penny?  Could be pareidolia!

Possible (probable) post minting damage?  Or. just a bad day at the Mint?  🤣

Serious rim errors all the way around, letters are crooked and look double punched.  A mess but fun to examine. 

I read that the Coin Mints put a layer of grease on the coins.  Maybe that's what's still on there (the Greasy flat globs).