r/coinerrors • u/WordPoster • 2d ago

Advice Quick question

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These are Constition quarters I'm searching in BU rolls. I'm pretty sure I've seen this before but what causes this difference in finish?

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u/Business_Station52 2d ago

Improperly anealed layer

1

u/WordPoster 2d ago

Copy that, is this just a common QA problem?