If your transparent clear green beads are a clear cast phenolic, then they may be Prystal - the trade name used by the Catalin Corporation for its range of clear cast phenolics which ranged from transparent clear (which all end up as 'apple juice' colour after years of oxidation) to other colours.

I've attached an image of a necklace I have of clear green Prystal beads which are much more uniform and regularly lathe-turned than yours, and the holes are different. Phenolic beads start out life as cast cylindrical canes which were then lathe-turned into round and oval etc beads.

Carole M