Set of 3 old champagne glasses in cut crystal with flat ribs Saint Louis? Béarn Talleyrand

This set of 3 champagne glasses is made of cut crystal. Certainly coming from the saint-louis crystal factory, it is a model close to the talleyrand service from baccarat. We find a similar model, called “béarn” at saint-louis. This glass service is recognizable by its 6 flat cut ribs and its smooth base. These glasses are in good condition, they measure 6 cm in height and 9.5 cm in diameter. I point out some chips on the glasses. There is no stamp on these glasses.