ref part of my post above:
'according to this listing the vase was produced by Bercy c.1820
http://www.seblantic.com/up/Opalines/@@sites@2@Product_xx_idProduct--21834__lang--en@@.htm'This vase was produced according to the listing, by Bercy c.1820s.
From reading this information below, it seems that Baccarat may have had access to that blue colour maybe?
'Despite some successes including the yellow and turquoise opal crystal, le Creusot fell into financial difficulties and in 1832. Baccarat and St. Louis came together, bought the factory and switch off the ovens.Two other factories were founded under the Restauration: Choisy-le-Roi in 1821 and Bercy in 1827. In 1832, a commercial agreement between Baccarat and St. Louis was extended to the manufactures of Choisy-le-Roi and Bercy, which had shown their qualities thanks to an excellent production.
Bibliography: Vincendeau, Christine, Les Opalines, Les Editions de l'Amateur, 1998, pp. 79-146'
The colour and quality of the opaline might indicate France then.
The style of the vase isn't the same as the one made in the 1820s because of the applied open foot.
The questions that arise at the moment are:
a) the picture comes from the Kirk engravings, which date earlier than that
b) the type of enamelling and decoration used, which seems to me to not be as sophisticated as it might have been had it been 1840s France maybe? e.g. Desvignes had been enamelling opaline glass in France using gilding and colours during the 1820s.
However, this biscuit type enamelling may have been similar to that used on Bohemian glass in the 1820s (Egermann),
and it does look similar to some enamelling found on Richardson pieces (ref earlier in thread), and the black outlines were found on Webb pieces of the 1840s/1850s.
c) the matt surface could date to an earlier period as Bohemian glass produced in the 1820s seemed to have a matt surface
for reference see:
https://www.liveauctioneers.com/item/5746392_288-vase-bohemia-kreibitz-glass-antique-vintage-old#&gid=1&pid=1d) the style of the vase with the large knop and applied open foot. However if you look at the Kreibitz vase above produced in the 1820s it also has that 'clunky' knop. I am not sure how the foot was applied on that vase though.
So it might be possible that the vase was produced earlier than 1840s. The opaline, the colour, the matt surface, the large knop, the design from Kirk's books and the type of enamelling might all fall into an earlier period.
The quality is excellent. I think if it did come from an earlier period it could be French.
However I've not seen anything with this Meander design or Etruscan type design on French glass from that period so far.
It was bought from a dealer in Lancashire in the UK. In this day and age that probably has no bearing however worth mentioning.
m