Hello, I came across this quarter quite some time ago and it resurfaced in my house recently. When I first found this, I assumed it was shot with a bullet, which created the bulge on one side, and assumed when I flipped it over, there would be an impression from where the bullet would have impacted. However, when I flipped it over, the area behind the bulge was normal, and there ended up being another bulge on the other side of the coin as well with no impressions. You can see there is a bulge on both the heads and tails side of the coin, however, they are on opposite ends of the coin. I tried pointing this out in the side view. Any information behind this defect would be appreciated.
Pretty sure it was subjected to high heat, possibly a blowtorch. This can cause expansion between the clad layers, resulting in a bulge on both sides of the coin. The coin appears to have been harshly cleaned as well, and there appears to be dark residue (probably from the heat source) in the areas that were not cleaned well.
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