I was finishing the last of these 1958's and came across this one. I tried to Get pictures from different angles but I'm not sure if the pics bring out what I see when magnified. There is a lot going on with this one. Even the back has some type of bubbles. I don't know what's going on with this one.
I'm not sure what's going on. There is no grooves or gouges near that slab on copper. There looks to be a layer missing under Liberty and some bubbles by the Cent. I have no guesses.
Quote: Solid-alloy cents minted in 1982 and earlier can have occluded gas bubbles caused from heat generated when a planchet is struck. The expanding gas pushes a layer of metal towards the surface of the coin, resulting in a raised area or bubble. Occluded gas bubbles are much rarer than the blistered plating found on newer cents. http://Lincolncentsonline.com/miscellaneous.html
Emphasis on the "possibly". I haven't seen occluded gas bubbles with such a distinct edge before. It does look like heat damage though, so if they're not gas bubbles it could have been in a fire. Looking at the condition of the rest of the coin, that would be my guess.
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