I'm checking through thousands of coins for errors, RPMs, etc. Currently, I'm going through thousands of
Roosevelt dimes (non-silver).
Several are off-center & have a noticeably much wider rim on one side, e.g., the west side of the obverse, & a much thinner rim on the facing side, e.g., the east side of the obverse. Is this considered an error with any monetary value?
Also, some are
Struck Through Grease, like the certified Starburst errors on the new
Presidential dollar coins. Is this considered an error with any monetary value?