I am struggling along, myself, to ID and pin down the authentication a blue cut to clear bowl, which seems to have been identified by others as Stevens And Williams. So, in a general way,(from looking a loads of S&W) I think S&W, certainly could have been the maker. But.the main reason I am responding is to be sure you know that the main flower on your glass IN PHOTO #2 would be called Morning Glory. Here,in CT,USA k, it is an annual flowering vine that reseeds itself and grows in the same area if happy. It might begin to bloom in July.... it is still blooming - open in the mornng -= now Sept 11, 2021. usually, an unremarkable pale purple, a favorite Light blue version is called Heavenly Blue, a striking dark purple is called grandpa Ott. Sometimes convovouous sometimes ipomoea if you search botanical style. very pretty glass. and the heart shaped leaves are just like my real ones. The flower does have a Trumpet sort of shape viewed from the side.