Antique liqueur carafe bottle in purple blown glass decorated with engraved flowers Portieux?

This lovely bottle is made of purple blown glass. It certainly comes from the portieux - vallerysthal glassworks. It is a small amethyst-colored glass carafe, decorated with a delicate decoration of wheel-engraved flowers. The stopper is clear molded glass and does not appear to be original. In good general condition, I note discreet traces of use and a slight deposit. This bottle measures 19.5 cm in height X 7.5 cm in diameter.