Welcome to the board Lorenza.
It does look like a well made piece of glass, the trailing looks to be even and carefully applied. The mark on the base appears to be the kind of mark left when the glassmaker snapped the vessel off the pontil rod, the rod was used to hold the vase as the rim was formed and then the trail added. Known as a snapped pontil mark, sadly it does not indicate any particular maker.
Nice vase though. Can you tell us the height please?