I am now the more-than-excited owner of this Dominion - 9 telephone line insulator! The date stamp on the side indicates it was made in 1962 in mould number 16. There aren’t any drip points on the base of the skirt either.
An archaeology friend brought it for me as a birthday present from her family farm, where apparently they used to find tons in the field! I may have shrieked a little upon seeing it~