Quote:
Looks more like copper to me
The bronze blanks were produced at the Heaton mint where copper blanks, coins and tokens were also being made. Wouldn't surprise me if somewhere along the way a copper strip was punched instead of a bronze one. Someday after many thousands of Provincial cents have been XRF tested a copper one may show up, stranger things have happened with our coins.
"Dipping" is not considered cleaning...
-from PCGS website