Anyone know anything about a serial number like this with a DH at the end?
Its cool, from the picture, the post letters look the same font as the Pre, but slightly up and not as deep.
It could be a rotating alpha numeric stamp that just happened to line up (you have four repeating 0s in the serial number) causing the extra stamps...
It could have been done post minting by someone with a hand punch set and the initials DH.
I have a P prefix bar with a dropped K letter BEFORE the Prefix that I feel was caused in the first manner I described.
It's all about what the people want...