Beautiful heavy/thick glass vases

I have been helping my mum clear out her attic and have come across a large amount of vases/plates/ornaments etc that I think are very interesting looking. My grandmother was Italian and we think some of this stuff was her parents.

These vases are 24.5cm tall matching thick-glass. On the bottom is a stamp which looks to me like a shark which I have discovered to be 'Strathearn Glass' from online searching.

Would welcome any comments on these vases.

Thanks for looking :-)