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Mystery Bubble
Numismaphile
Posts: 51 ✭✭
This quarter has a raised "bubble" on each side. I've seen this before and want to know whether it's an error or post mint damage, and how it happened. It's not extra material applied to the coin like solder, it clearly is the coin itself raised. I don't know if there is a pocket of air or a vacuum under the surface. Any theories? I suspect heat damage but the color is fairly original.
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Extreme heat can cause a bubble in clad coins.
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"Paper money eventually returns to its intrinsic value---zero."----Voltaire
"Everything you say should be true, but not everything true should be said."----Voltaire
Like the extreme heat caused by an electrical fire?
chopmarkedtradedollars.com
Campfire coin, heat separates the clad layer from the copper core. As the clad layer cools you see this pooling or bubble if you prefer effect.
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@lermish beat me to it, that jumble of extension cords completely stressing me out!