The line through the motto is caused by the Die Deterioration. This is very common among cents of that period. I'm sure someone else can explain how that ridge or line actually forms, as I can't remember. I'm pretty sure it is due to the way the die wears out and deforms slightly. I'm also pretty sure that's why it looks like there is an extra L in LIBERTY. The metal of the die has deformed, making it appear as if there is an extra L, but it's just die wear, similar I think to the 1955 "poor mans" doubled die.
Dave
Dave




















