Glass Thingies With Lustres -- Help!

Your guess is as good as mine, Bev. But since it's a pair (should be more value in a pair, right?) and both have the alternating prisms, I would expect that they came that way -- or, one had the ball and one had the point and someone decided to alternate them.

OK, c. 1920 is what I'll go with, thanks Leah!