Hi Paul, yes, polished out pontil scars are normally later than rough ones but there was nothing to stop the scars being polished out in the 18th century other than convention and effort. I've had occasional mid-18th century Georgian glasses with genuine period polished out pontil scars and mid-19th century Victorian glasses with rough ones. Pity oldglassman (Peter) no longer appears to post on this site as it was he who educated me as to the occasional abberant glass. Kind regards, Neil