I don't think it's AS, at least not conchiglia, as the bowl is folded over. And saying it's a 'Valva' is ridiculous, unless I've missed seeing an obscure version of it. Certainly, it's not anything the versions of 'Valva' in either Ricke, 'Italian Glass' or in Olnick Spanu
I find this seller very inconsistent. Having said all that it looks like a decent piece, but $120 with clearly the wrong attribution?