I bought these stems a long time ago and they have been sitting on a shelf at eye level in front of me in my ‘office’. I didn’t know where to start with them to ID them and, in my opinion, the stems looked like others.
I figured if I waited long enough I would see them on some website and that is what happened.
Someone IDed them on Facebook as Radiant Ruby – line #7685 – from Morgantown Glass. The stems the person had were a different shape – wine glass if I recall correctly – but the details were pretty darned similar.
I figure that I am about 80% sure that these are from the Radiant line. If so, they were produced in the 1970s.