Grape/all...after looking at other 1920 Mercs, I actually found others just like it. Mostly that reverse, right side impression. Obverse, nothing really except a faint little of those under chin bumps. I also read that at the Mints, if they discover these clashed dies, which QA eventually does, they will attempt to correct the die (salvage) by polishing as you say, and if successful put back in service. Of course some remnants will show for original die clash, albeit less pronounced, and acceptable. At least that is a summary and consensus of what I read. They also will collect up all die clashed coins they can find from the original problem Die once quality catches. But not all are found. Hence...we have these samples that got circulated. If that is not the case as you experienced folks see it, fire away on where I have missed it. Thx.