Welcome, Error hunting offers little gratification for the beginner. Collecting is the way to get a start..
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Plating blisters are very common on zincoins, especially the earlier years.
Eventually they will expand and break exposing the zinc core to air which
will then cause it to start rotting.
Answers
Is this common? New to collecting, wasn't sure if this is worth adding to my collection.
Yes, probably a plating blister:
https://www.error-ref.com/blisteredplating/
Post the rest of your collection. We'd all like to see it.
Welcome, Error hunting offers little gratification for the beginner. Collecting is the way to get a start..
Stick around, read about the coins we like to talk about.
Plating blisters are very common on zincoins, especially the earlier years.
Eventually they will expand and break exposing the zinc core to air which
will then cause it to start rotting.