It does ... and it is. I understood that book is the most recent authority on French opalines. I don't have the book though so I'm not sure what museum access or reference sources Vincendeau used. That said, Cristallerie Saint-Louis and Baccarat are both still going concerns so presumably have archives and recipes.
I have Baguiers et Verres a Boire (Darnis) which is recent but it's goblets, tazzas and little tumblers so not covered in there and nothing like the vase to compare.
Launay Hautin covers up to 1841 on Pressglas-korrespondenz
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