Chemically altered or…?

Found this 1942 D mint wheat penny and has an odd tone. Slight and I mean very slight copper color but not anything like it should be and under microscope there is no buffering marks. Weight is correct. Photos below
Tagged:
0
Comments
Its been cleaned in the past, too pink.
My Collection of Old Holders
Never a slave to one plastic brand will I ever be.
Altered.
What would the "die error" be?
@jmlanzaf good catch was multi tasking.
I won’t post in your threads if you make my posts moot with an edit. I own my stupid.