I saw this thread posted by a new user with follow up requested but within an old thread. Thought it should go here. https://www.cointalk.com/threads/andrew-johnson-no-edge-markings.315842/
From what I see, the edge has been buffedoff. On a true MEL, the copper core is NOT centered, it's slightly more to either the obv. or rev. side of the coin, not centered. This is due to how the planchets are punched out and then received the upset rim; The copper core is centered, as logic would have, but due to the upsetting, the copper core shows more to one side of the edge than the other. In this photo shown, the copper core band is wider, and dead-centered. It's been buffed.