Is This An Over-Assayer?

Looks like just a piece of slag on the surface, like the two on either side of the H. That bit has the general shape of a J, but it's much too small to be of the font struck on these coins.

Thanks, guys. I will send it to NGC as misattributed and see what they come back with.

This makes me wonder about the process of reworking the dies in a situation like this. Would they fill-in the old assayer with a softer metal, polish off the surface, and punch the new initials in? If this was the case, it could explain why the undertype is just a thin outline. Softer metal during strike would give-in slightly under the pressure of the strike, resulting in a faint raised surface.