I didn't give the bowl a second look when I saw it. When the seller said it was by Lalique I was rather incredulous. The only reason I gave it a chance was the suggested date of manufacture and the second expert opinion obtained by the seller, whose specialty was scientific instruments not glass.
About the colour of the glass, could it be re-used opalescent glass? I don't understand the technicalities of this, but is it a possibility given that 1945 would have been a tough time to get materials?