Thanks Paul and Ivo. The stems have vertical mould marks. I thought they may have been part moulded to guarantee consistent volumes of ice cream. They seem precisely accurate. However, I think I have seen a photo or engraving somewhere of these things in use and they hung from the side of the cart in some instances and perhaps the symmetrical method of manufacture looked smarter when on display prior to use. Obviously just their mass production generally could have led to mould usage!
The TB issue had not really occurred to me. The scale of tragedy at the time is hard for us to compute and the banning of these was probably wise. They are great pieces of social history though. I am not sure about the salt- penny lick glass confusion of your second piece Paul but the first looks more generous a portion than mine, there were several sizes made and yours looks like one of those, like mine, definitely designed for ice cream. I won't be using mine, you won't be surprised to hear! Display only!
Robert (bOBA)