Hi,
Sorry to disagree with you on this occasion John, but the ones I own and have had in the past have a pointed stopper, running down to a rounded base, then into a waist before widening slightly for the peg. Tear-drop form with a wide base, might be another way of describing it. Then the surface is rippled to match the base. Also made made Tudor Crystal.
Sorry, mine aren't accessible, so no piccy.
Nigel