Ok, Can someone please tell me what happened to the 5 on the 1957 Lincoln? Thanks. I posted the 1955 for a comparison shot of the 5's.
Ok, die chip. I'm googling this stuff because someone said PMD in another thread and I had no idea what it was and found out it meant "post mint damage", but cool, thanks for the info.
I am not an error collector nor an expert on errors, but I think a die chip is a good assumption. (I originally thought struck through grease, and was going to put that down. I edited)