I had been more inclined to think S&W on this dark green bowl (of which you now have the clear version!

) But I think that's because many years ago when I was researching all the tadpole/dab/peacock eye vases I'd come across that bowl with the Illustrated Catalogue of English Table Glass source reference I've just linked to.
So to be fair, if it turns out to be Stuart, it was Christine who first noted that she always though of it as a Stuart green not me

And I'm coming round to thinking it could be Stuart more now that observation has been made.
John the suggestion of OP's bowl possibly being shaped to hold a lid is a good one. It could also be that it had a wire insert in the top to hold flowers perhaps as well?