hoping these images come across clearly-
i'm showing examples i have - one knotted necklace -original stringing, with a moulded czech 1920s type tassel top pendant same shape as yours, an elliptical rounded cone with the remains of a tassel of red thread inside the opening,
and 4 rectangular-section (sort of pyramid shaped) tassel tops -different colours, longest dimension 1" or approx 25mm, together with some other Czech moulded beads showing the circle/dot design including a whole string of red ones-
in one image you can see inside one of them and discern the hole at the point at the far end.
next time we meet, Floor, i'll give you one of them.
i dont remember seeing any of these in the Jablonec Glass museum...