I do not know much about plachet adujustment marks...does anyone else? The scratches do not cross over any letters..all under them. the obverse looks MD? And I took a closer look at the ear...it looks doubled...does anyone see it? Thanks
after a little research, I think this is what you would call roller marks? Roller Marks go Underneath the Devices - Another diagnostic for confirming roller marks are that they will go underneath (and sometimes across) the devices on the coin and continue on the other side. The reason is that, as a feature of the planchet itself, when the coin is struck the lines are usually obliterated by the devices rising from the surface of the planchet during striking. The roller marks on the field area of the coin are often still present because the force of the strike wasn't enough to obliterate them. Large coins are more difficult to strike well, which is why roller marks are far more common on large coins such as Silver Dollars, than they are on smaller coins like Seated Dimes.
I doubt that there would be adjustment marks on the cent, these marks are incuse and you would normally see them on silver and gold coins and do not appear on U.S. coins after 1840. I can't see it clearly but it shows signs of being gas bubbles under the plating.
Raised lines behind devices sounds like common die scratches - they would be incuse on the die and frequently not on the devices (e.g., letters) as they are also incuse (but deeper) on the die face. Alternatively, but unlikely, it could have been the feeder finger scrapping across the die face. If there is MD on the obverse the ear was also likely impacted.
Can't see the neck shot clear enough to make an assumption. The lines are either gas bubbles or heavy polish marks.
