Personaly I dont think I can venture to say this is that old, or by Poli.
I have almost given up on all these Sommerso pieces, since so many of them are being reproduced, in all colors and all styles.
Maybe someone else who has owned similar pieces can put their 2 cents in.
Sorry Im not much help on this one.
One thing, the top rim folded inward is a bit weird. The ones I have seen in the bud vase shape have a flat top.