David, thanks a lot for looking into this!
The bowl is by far my most interesting Murano item, so I am curious to learn more about it.
I have read a thread on the fossilfly forums where a Corroso piece was finally identified as French 1930s (I think you contributed there as well
, so I am aware that there are other possibilities than Murano -- but this one just screams "Murano!" to me
Your green/blue Corroso vase is great, where ever it may have been made.
I did quite a lot of internet research on Corroso and Murano, and you are right that most pieces have a rather restraint shape.
After looking at hundreds of bowls and ashtrays I couldn't find anything similar to mine (not even shape-wise -- closest are some deeply lobed Barbini bowls). But none has the deep bumps to the underside.
And that I have seen Corroso pieces by all of the big companies doesn't help in attribution either...