Ivo, thank you for pointing out the previous discussions re prunts which I have read with interest.
Rather than post comments on the old posts I thought that I would post them all here instead (not sure if that is a good move or not). No comments on the lion's head prunts but I do on the 'cherubs'. Definitely agree that they are not cherubs but not sure whether masks - Anita's suggestion. The man in the three cornered hat is the symbol of the Venetian Carnivale, I think this is the man's face (possibly a mask) and the frame to the prunt represents the underside of the hat. I have a jug which features this image and The Loschs have a Venini/Bianconi poodle on their website with this head instead of a poodle's head. The edges of the hat are always depicted as ruffled which, I imagine, might indicate that they were, in reality, feathered.
In another of the old posts on prunts there was a discussion of heart shaped bowls and, once again, I see them as representing this tricorn hat not a heart.
Regarding the attribution of ruby coloured glass:-
From the Barovier website:-
C. 1887 The "Artisti Barovier" company awarded a "brevetto di procedimento" (the italian words for procedure patent) for the production of "ruby and cornelian without gold" (rubino e corniola senza l'uso dell'oro).
I have therefore always believed that the very intense dark ruby red glass was their work and have certainly seen examples of what are certainly some of their designs in this colour. Hope that helps but feel free to disagree!