Wondered how this happened? Parts of the nickel look coppery like a penny. Thank you. 1989 not quite sure if there is a "P" or "D" after that. Hard to tell. https://onedrive.live.com/redir?resid=281BB7E06FC99F88!116&authkey=!AOYRtepRHfgAkRQ&ithint=album,
Looks more like oil or corrosion to me - just my opinion of course. Actually reminds me of some gas station parking lot finds.
Looks like a heat toning normally tone or get black. But haven't seen a black one dated pass 1964 if I recall correctly.
