Likely an early twentieth century line, I think it is line #760, but am not 100% sure.  Pretty little etch.  you’d think it would be named “Carnation” as it sure looks like these are carnations.

I think this stem is the oyster cup.  I have had other oyster cups and marvel at the tables folks set in the past to have a stem specifically for oysters!  Must have been alot of washing up once dinner was over.

More likely a fancy fruit cup now.