I was reading in "the guide book of shield and liberty head nickels" they mention something about "pebbling" of the planchet's
Quote
"Sometimes one side or both show metal flow or pebbly, stippled fields, rather then flat surfaces"
I am not certain of that pebbly reference towards a coin but could this be what they are referring to? I would think it would mean raised bumps not little pot holes, am I wrong.