When the 1869(?) penny in a previous thread was rejected for corrosion, the consensus was a roughened patch in the reverse field as the reason because the problems didn't exactly leap out at you. In this instance, the only bit that isn't corroded is the P of penny and the datal figures. 1869s are available in reasonable quantities, 1882 no H pennies aren't. I rest my case. Peter is going to have to start giving that Centisles bloke a bit of credit soon. At least his overgrading is consistent.