Attached are samples of a well struck coin, and a weakly struck coin. Both of these coins are lusterous uncirculated, but there is less detail on the weakly struck one. (my camera does not show the extremely shiny surface, but both coins are very shiney, and uncirculated). You can notice in the middle of the coin (the highest point), there is loss of detail, which means the coin was not fully struck. Additionally the head, and the center, lower skit lines are not as clear on the poorly struck coin. Usually a poorly struck coin is due to either die wear, as the die ages, or a coin that has been struck with less pressure, as might be in the early punch press setup, for the start of a coin run cycle.