I am pretty sure that I have owned this stem with some other decoration.  In any event I recognized it as Bryce when I saw these in the Pick n Save (if that’s the correct name) in Luray, Virginia.

I have subsequently found the pattern on Replacements.com, but they have not provided any information other than they are calling the etch/cutting pattern #325-4.

I wonder if the tumbler is also part of the #325 line.  I looked through all the Bryce shapes at the Elegant and Everyday Glass Forum, and through Replacements, but didn’t find the exact tumbler.  I’ve posted the query, but no response yet.

Older pieces, early twentieth century I am guessing.