Vintage Green Glass Bowl??

I bought this thinking it may be Whitefriars knobbly glass but now am not sure !! Its lumps are on the inside & indents on outside ..
It came from the local charity shop in sw u.k ..
I've searched the web but can't seem to find it anywhere..
It's a well made piece with a ring the same as my other whitefriars bowl when you flick it!!
Its 12"w x4,5"h lots of age related Mark's on the base making me think it could be 1930s or older..
Has anyone got any ideas ??
Many thanks S.d