Neptunea antiqua (LINNÉ)?

Fossil mollusc, Possibly a very worn juvenile Neptunea antiqua?? (gastropod); very worn apex of shell; borehole from the Quaternary (Pleistocene, Early Pleistocene) deposits, Icenian Crag, of the Royal Society Borehole, Ludham, Norfolk, England examined by Dr Peter E.P. Norton, 1961