In 1982 and 1983 plating issues were pretty common. Basically ubiquitous.
In 1984 the mint had the vendor add a tiny bit of copper to the zinc core so the plating adhered better (I've read this, but never been able to find a REPUTABLE citation).
Thus plating issues are (a little) less common for 1984ff.
-----Burton
50+ year / Life / Emeritus
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https://www.sampleslabs.info/