I scrutinize every coin I come in contact with whether it be in the wild or purchased looking for any error. Mostly it's moderns (post 1930) as I don't have the funds or knowledge at this time to comfortably extend my range. While I try to expand my knowledge in increments, I tend to focus on the 1950-1990 range. With that said somewhat long windedly, I pose this question to all... What do you think are the toughest coins to attribute for errors and varieties? Personally I find the Jefferson nickel the hardest to spot and find the markers on. I'll attribute this to the amount of surfaces and areas to be searched in comparison to the other coins. You can add your best find too.
