I couldn't get Frank's link to work either.
In your links m there is nothing remotely similar to the shape/decoration of the two opaline jugs of which we are speaking here, and as you don't have the Miller's book you're not going to see the example I mentioned, but I assure you the similarity is striking.
Neither is there any mention in Miller's of the source of the Baccarat attribution (not unusual in books) - someone's personal experience no doubt.
Suggest you send images to the V. & A. or Broadfield House, otherwise leave yours as simply French
P.S. Does anyone else have this particular Miller's book??