Hi,
the Bohemia label was used by several Czech glassworks. Your bell
however is part of the ´Nemo´ range, designed by Max Kannegiesser
for Borské Sklo in the early 60´s.
Some examples are shown in Mark Hill´s ´Hi Sklo Lo Sklo´, but I´m
sure the search option of this board will bring up some further topics,
too.
Regards,
Dirk