Umm... Wouldn't that be "MARS"? Oh you said Planchet. Nahh, looks fine to me, anyways. Machine Doubling perhaps?
The letters look like crimper damage. It really dug in under the "E." The bottom of Lincolns coat is the pink color of the planchet where it was not fully struck.
potty dollar 1878, posted: "Damaged,reeded edge impacted from another coin." Absolutely Not. The OP said the mark thru the "N" is raised and it dose not show any damage to the letter. Collecting Nut, posted: "I need to see the entire coin." Everything needed to answer the OP is visible in the micrograph. Die break on forehead and die chip behind neck.