How do you know if its real Murano glass? One-piece dip molds could produce about any cross section bottle shape - round, square, octagonal - but had to be designed to be removed from the top i.
Pontil Name Meaning & Pontil Family History at images.dujour.com®
Empirical observations indicate that this was the dominant mold type for mouth-blown bottles from the late 1880s to the domination of bottle making by automatic bottle machines by the late 1910s.