by mtalbot_ca » Sun Jul 31, 2011 10:41 am
Hi there,
I am no expert but a picture would certainly help, those that are experts. However, from what you mention, it could be a case where that coin was found by a metal detector and therefore was buried for an extended period of time. The removal of concretions while cleaning the coin could have caused what you described.
Cheer,
Common sense should prevail if not, misery will.