I'm 99.1% sure PCGS goofed on this. This is a zincoln that just weighs a little heavy. An XRF only hits the surface, so how would you get an accurate reading? Even so, 99.1% copper and 0.9% zinc weighing 2.87g makes absolutely no sense. That has to be someone new using an XRF and not understanding how it works. Look at the parallel, rippled texture all over it. Have you ever seen that on anything but a zincoln? And no, not wood grain toning. That's different. This label makes absolutely zero sense to me. What do you think? Agree? Disagree? Why? Link to coin: https://www.greatcollections.com/Coin/2073804/Mint-Error-2017-P-Lincoln-Cent-Shield-Struck-on-Bronze-Planchet-991-Copper-09-Zinc-287g-PCGS-MS-64-RB