I meant has the base been smoothed on a grinding wheel? Like a pontil mark but round the edges. A smooth pontil mark is created by grinding and polishing. Sometimes moulded items have had their bases ground as part of the finishing process, either round the edges (the bit that stands on the table) or occasionally all over. But it doesn't look to have a rim on the base at all, just a straight out of the mould flat(ish) base.