Hi , this is my last find over the Xmas period which has been a bit of a puzzle ,it’s 7” high and 4”tall .It has a slightly pushed up base and a polished pontil with a lot of wear . I picked it up thinking vintage but I’m not so sure ?, ..it’s heavy for its size with a lot of air bubbles which you can feel on the inside , but not on the outside and I don’t think they are there as a feature ?There is no ring when flicked .Any thoughts many thanks (air bubbles on inside photo 2)