Very flat and the rest of the leg is thinner than normal. Classic characteristics of Mechanical doubling
Try comparing the coin you find to on-line pictures of the same date and MM...unless you have another of the same in mint state condition handy...Spark
I did compare to another but it doesn't look like a strike error. And believe me I have plenty. It's actually a perfectly pertruding line. It's isn't flat like the other MDDs.