Help Identifying Line Behind Features

Looks like some kind of debris, like glue residue.
John1

with coop.

Thanks guys. Perhaps a quick soak in acetone and then weighing it would find supporting evidence of this line being a foreign substance?

Im pretty sure it is a planchet and/or plating issue. Notice how in the second picture, the top of the memorial doesn't come down in a straight line all the way to the main part of the memorial? There is an indent. Like something kept the normal image from imprinting on the coin. Something that would have to be raised to keep the die from fully imprinting the image on the coin in that exact spot. If it was Glue, residue, rubberband, etc., it wouldnt affect the relief of the design unless it was on the blank planchet to begin with. The memorial top would come straight down like normal, not have a sharp right turn that follows the line exactly, then veer down. It would look like it traveled right behind it like the rest of the raised areas on the coin. Plus if it was glue or something, I'm guessing it wouldnt be so uniformly rubbed off the all the raised areas without a trace and leave such a perfect straight line untouched barely below the raised fields. I'd say it would have to be a flaw in the planchet.

Here's an example of what I mean. The top should follow the red line down. Not zag to the right like the yellow line which happens to follow the line through the coin exactly.

I guess I'm right.